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Work: Alarm Responses Flashcards

1
Q

Given a Autoclave High Pressure (Alarm High) alarm, the Control Room Operator will perform Immediate Actions in accordance with DUF6-X-OPS-0610 Section 1.10

A

1.10 (CTS-010) Autoclave High Pressure (Alarm High)

Description Pressure is monitored in the CTS Autoclave (BPCS) to detect a DUF6 leak or a ruptured Cylinder.

Setpoint 1.03 bar (14.9 psig)

Trigger PI0_1511 (AU-151) - ≥1.03 bar

A. Automatic Actions

  1. TIC0_1511 (AU-151 – HY0_1511A), Autoclave Temperature Controllers, goes to Manual and 0%.

B. Immediate Actions

[1] Ensure all Automatic Actions occur.

[2] Notify Shift Supervision.

[3] Monitor Autoclave Temperature and Pressure.

Note: Autoclave Heating Elements shall be de-energized before the pressure in an Autoclave exceeds 10.3 Bar gauge (150 psig).

DUF6-X-TSR-002, TSR 5.5.3.4 A

[4] Ensure Autoclave Heating Elements are de-energized before Autoclave pressure exceeds 10.3 Bar gauge (150 psig).

C. Probable Cause

  • DUF6 leak in Autoclave
  • Cylinder rupture in Autoclave
  • Bad instrumentation
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2
Q

Given a VAP Room CTS UF6/Uo2F2 Leak Detection (Alarm Urgent) alarm, the Control Room Operators Immediate Actions in accordance with DUF6-X-OPS-0610 Section 1.1

A

1.1 (CTS-001) VAP Room CTS UF6 / UO2F2 Leak Detection (Alarm Urgent)

Description Detects a DUF6 release and provides a signal to the ISS to secure DUF6 flow from the Cylinders in the CTS Autoclaves and CER. Also, sends a signal to BPCS to de-energize CTS Autoclave heaters and secure DUF6 flow from the Cylinders in the CTS Autoclaves and CER.

Setpoint N/A

Trigger CTS-AAH-1000 (CTS-AS-1000 = OFF)

A. Automatic Actions

  1. VA0_1502, CTS CER DUF6 Header Isolation Valve, closes. (ISS Interlock I-1.0)
  2. VA0_1515 and VA0_1525, CTS Header Isolation Valves, close. (ISS Interlock I-1.0)
  3. TIC0_1511 and TIC0_1521, Autoclave Temperature Controllers, go to Manual and 0%. (BPCS)
  4. VA0_1512 and VA0_1522, CTS Header Nitrogen Purge Valves, open. (BPCS)

B. Immediate Actions

[1] Ensure all Automatic Actions occur.

[2] Notify the following:

a. Shift Supervision

b. FBP Emergency Services by dialing 911 using an office phone or 740-897-2444 using a cell phone.

WARNING

This alarm indicates a possible UF6 release with corresponding UF6 exposure hazard. Personnel shall not enter the area without FM permission.

[3] Make PA announcement to evacuate Vaporization Room.

[4] Notify ES&H of possible DUF6 leak in Vaporization Room.

C. Probable Cause

  • UF6/UO2F2 leak
  • Detector failure
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3
Q

Given a DUF6 Header High Pressure (Alarm High) alarm, the Control Room Operators will perform Immediate Actions in accordance with DUF6-X-OPS-0610 Section 1.20

A

1.20 (CTS-020) DUF6 Header High Pressure (Alarm High)

Description Pressure is monitored (BPCS) on the DUF6 header inside the Autoclave to determine the Cylinder pressure.

Setpoint 5.17 bar (75 psig)

Trigger PI0_1512 - ≥5.17 bar (AU-151)

A. Automatic Actions

  1. TIC0_1511 (AU-151 – HY0_1511A = OFF), Autoclave Temperature Controllers, goes to Manual and 0%.

B. Immediate Actions

[1] Ensure all Automatic Actions occur.

[2] Notify Shift Supervision.

[3] Investigate cause.

Note: Autoclave Heating Elements shall be de-energized before the pressure in an Autoclave exceeds 10.3 Bar gauge (150 psig).

DUF6-X-TSR-002, TSR 5.5.3.4 A

[4] Ensure Autoclave Heating Elements are de-energized before Autoclave pressure exceeds 10.3 Bar gauge (150 psig).

C. Probable Cause

  • High Autoclave Temperature
  • Bad instrumentation
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4
Q

Given a DUF6 header high pressure (Alarm Urgent) alarm, the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0611, section 1.8

A

1.8 (VAP-008) DUF6 Header High Pressure (Alarm Urgent)

Description DUF6 Header piping is monitored for increasing pressure (BPCS).

Setpoint 5.17 bar (75 psig)

Trigger (AU-101 LINE 2) 2-VAP-PI-1012 ≥5.17 bar

DUF6-X-TSR-002, TSR 5.5.3.4 A

A. Automatic Actions

  1. X-2-VAP TIC-1011 = MAN 0% (X-2-VAP-HY-1011 = OFF)

B. Immediate Actions

[1] Ensure all Automatic Actions occur.

[2] Notify Shift Supervision.

C. Probable Cause

  • TIC failed high
  • Blockage in the piping
  • Temperature to high
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5
Q

Given a DUF6 Cylinder High Temperature (Alarm Urgent) alarm, the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0611, section 1.14

A

1.14 (VAP-014) DUF6 Cylinder High Temperature (Alarm Urgent)

Description Cylinder Temperatures are controlled by reverse acting temperature loops, with independent thermocouples for over-temperature shutoff.

Setpoint 110°C

Trigger (AU-101 LINE 2) 2-VAP-TI-1012 ≥110°C

A. Automatic Actions

  1. Temperature shut-off for affected Autoclave only

AU-101 LINE 2 2-VAP-TIC-1011 MANUAL at 0%

  1. HY-1011A = OFF

B. Immediate Actions

[1] Ensure all Automatic Actions occur.

[2] Notify Shift Supervision.

Note: Autoclave Heating Elements shall be de-energized before the pressure in an Autoclave exceeds 10.3 Bar gauge (150 psig).

DUF6-X-TSR-002, TSR 5.5.3.4 A

[3] Monitor Autoclave Temperature and Pressure AND Ensure Autoclave Heating Elements are de-energized before pressure in an Autoclave exceeds 10.3 Bar gauge (150 psig).

C. Probable Cause

  • Temperature Controller failed high
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6
Q

Given a DUF6 autoclave high pressure (Alarm Urgent) alarm, the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0611, section 1.38

A

1.38 (VAP-038) Autoclave High Pressure (Alarm High)

Description Pressure is monitored in the Autoclave to detect a DUF6 leak or a ruptured Cylinder.

Setpoint 1.03 bar (14.9 psig)

Trigger (AU-101 LINE 2) 2-VAP-PI-1011 ≥1.03 bar

A. Automatic Actions

  1. Temperature shut-off for affected Autoclave only

AU-101 LINE 2 2-VAP-TIC-1011 MANUAL at 0%

  1. HY-1011A = OFF

B. Immediate Actions

[1] Ensure all Automatic Actions occur.

[2] Notify Shift Supervision.

Note: Autoclave Heating Elements shall be de-energized before the pressure in an Autoclave exceeds 10.3 Bar gauge (150 psig).

DUF6-X-TSR-002, TSR 5.5.3.4 A

[3] Monitor Autoclave Temperature and Pressure AND Ensure Autoclave Heating Elements are de-energized before pressure in an Autoclave exceeds 10.3 Bar gauge (150 psig).

C. Probable Cause

  • DUF6 leak in Autoclave
  • Cylinder rupture in Autoclave
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7
Q

Given a DUF6 Low Nitrogen Supply Pressure (Alarm Urgent) alarm, the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0612, section 1.7
*DUF6 Shutoff Interlocks for each line.

A

1.7 (CON-007) Low Nitrogen Supply Pressure (Alarm Urgent)

Description Nitrogen is required to heat the Conversion Unit to the operating range and is required for Conversion processing. A signal is sent to BPCS on low pressure.

Setpoint 4.0 bar (58 PSIG)

Trigger PI100N1_Sig ≤4.0 bar

A. Automatic Actions

  1. DUF6 Shutoff of Lines 1 & 2 & 3

B. Immediate Actions

[1] Ensure all Automatic Actions occur. (See Attachments A and B)

[2] Close Hydrogen Supply Valve CON-VA-100HS1.

DUF6-X-TSR-002, TSR 5.5.3.4 M

[3] Notify FM or designee.

[4] Ensure VA1-1012, VA1-1022, VA0-1512, VA0-1522, VA2-1012, VA2-1022, VA3-1012 and VA3-1022 are OPEN.

[5] IF directed by FM or designee, THEN Refer to DUF6-X-AOP-0005, Recovery from DUF6 Shutoff for recovery actions.

[6] Investigate the cause.

C. Probable Cause

  • Failure of the Nitrogen production facility
  • A large Nitrogen leak in the system
  • Spurious Alarm - Instrument failure or Signal Transmitter failure
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8
Q

Given a DUF6 Low Nitrogen Flow alarm (CON-074), the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0612, section 1.75

A

1.75 (CON-075) Low Nitrogen Flow Alarm

Description A signal is sent to BPCS on Low Nitrogen Gas Flow to the Fluidizing Gas Heater.

Setpoint 85 SCMH

Trigger FI2-2022 ≤85 SCMH

A. Automatic Actions

None

B. Immediate Actions

[1] Close X-2-CON-VA-100H2 (Conversion Unit Manual Hydrogen Isolation Valve) for associated Conversion Unit (X-2-CON-VA-100H2 for CU-203).

DUF6-X-TSR-002, TSR 5.5.3.4 N

[2] Notify FM or designee.

[3] Investigate the cause.

[4] IF directed by FM or designee, THEN Refer to DUF6-X-AOP-0005, Recovery from DUF6 Shutoff for recovery actions.

C. Probable Cause

  • Spurious Alarm - Instrument failure or Signal Transmitter failure
  • A problem with HE2-202 Fluidizing Gas Heater
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9
Q

Given a DUF6 CU-203 HF Leak (ISS Trouble Alarm), Operations personnel will perform immediate actions in accordance with DUF6-X-OPS-0612, section 1.305

A

1.305 (CON-351) CU-203 HF Leak (ISS Trouble Alarm)

Description Detects a general failure of the HF detector on Line 2 Conversion Unit CU-203 and provides a signal to the ISS (Interlock 1-2A).

Setpoint None

Trigger ASH2-2001 = OFF [ISS]

A. Automatic Actions

None - ISS Interlock 1-2A Alarm Only

B. Immediate Actions

Note: This alarm requires entering LCO 3.3.1, CONDITION A.

[1] Notify the following:

  1. Site ERO by dialing 911 using a DUF6 office phone or 740-897-2444 using a cell phone
  2. FM or designee

WARNING

No re-entry to the area without Incident Commander and/or FM approval.

[2] Make a PA announcement to evacuate the area.

[3] Notify Maintenance there is a failed HF detector on Line 2 CU-203.

[4] Establish alternate HF monitoring in the affected area in accordance with IH Program Requirements.

DUF6-X-TSR-002, LCO 3.3.1

C. Probable Cause

  • Faulty Detector
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10
Q

Given a High H2 Supply Pressure Alarm (Alarm High), the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0612, section 1.310

A

1.310 (CON-356) High H2 Supply Pressure (Alarm High)

Description Hydrogen must be provided at the specified rate to meet DUF6 processing rates. A signal is sent to BPCS on high pressure in the conversion building.

Setpoint 5.0 bar

Trigger PI100DA sig

A. Automatic Actions

None

B. Immediate Actions

[1] Notify shift supervision.

[2] Investigate the cause.

C. Probable Cause

  • Failure of an H2 pressure regulator. The HDS pressure regulating system is not functioning properly.
  • Failure of the pressure transmitter.
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11
Q

Given a DUF6 Condenser Room HF Leak (ISS) alarm, the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0614, section 1.5

A

1.5 (HFR-005) Condenser Room HF Leak (ISS)

Description Detects an HF vapor release and provides a signal to the ISS. (Interlock I-5A).

Setpoint N/A

Trigger HFR-ASH-5021 = OFF [ISS]

A. Automatic Actions

  1. NONE ([ISS I-5A] No Interlock – Alarm Only)

B. Immediate Actions

[1] Ensure the following are closed as indicated on BPCS (all conversion lines shut down):

  • VAP-VAn-1015 (AU-101)
  • VAP-VAn-1025 (AU-102)
  • X-0-CTS-VA-1515 (AU-151)
  • X-0-CTS-VA-1525 (AU-152)
  • X-0-CTS-VA-1502 (CTS CER DUF6 Header Isolation Valve)

DUF6-X-TSR-002, SAC 5.5.3.4.C

[2] Ensure VA1-1012, VA1-1022, VA-1512, VA-1522, VA-1503, VA2-1012, VA2-1022, VA3-1012, and VA3-1022 are OPEN for all cylinders that were feeding.

[3] Initiate an off-normal shutdown of all conversion lines per DUF6-X-OPS-n212, as directed by the Facility Manager.

[4] Notify Shift Supervision.

[5] IF the alarm is unanticipated, THEN Call site ERO by dialing 911 using an MCS office phone or 897-2444 using a cell phone.

WARNING

No re-entry to the area is permitted without Incident Commander and/or Facility Manager permission.

[6] Make the following PA announcement: “We have a Condenser Room HF Alarm. All unauthorized personnel evacuate the Condenser Room.”

[7] Notify ES&H there is a possible HF release in the Condenser Room.

C. Probable Cause

  • HF release
  • Spurious Alarm - Instrument failure or Signal Transmitter failure
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12
Q

Given a DUF6 Scrubber Room HF Leak (Alarm Urgent) alarm, the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0614, section 1.9

A

1.9 (HFR-009) Scrubber Room HF Leak (Alarm Urgent)

Description Detects an HF vapor release and provides a signal to BPCS.

Setpoint N/A

Trigger AAH-5062 = ALARM [ISS]

A. Automatic Actions

  1. 1-VA-505D, 2-VA-505D, 3-VA-505D = CLOSE.
  2. HVA-FN-068 = OFF, HVA-FN-069 = OFF, HVA-FN-070 = OFF, HVA-FN-071 = OFF, HVA-FN-072 = OFF, HVA-FN-073 =OFF

B. Immediate Actions

[1] Ensure all Automatic Actions have occurred.

[2] Ensure the following are closed as indicated on BPCS (all conversion lines shut down):

  • VAP-VAn-1015 (AU-101)
  • VAP-VAn-1025 (AU-102)
  • X-0-CTS-VA-1515 (AU-151)
  • X-0-CTS-VA-1525 (AU-152)
  • X-0-CTS-VA-1502 (CTS CER DUF6 Header Isolation Valve)

DUF6-X-TSR-002, SAC 5.5.3.4 D

[3] Ensure VA1-1012, VA1-1022, VA-1512, VA-1522, VA-1503, VA2-1012, VA2-1022, VA3-1012, and VA3-1022 are OPEN for all cylinders that were feeding.

[4] Initiate an off-normal shutdown of all conversion lines per DUF6-X-OPS-n212, as directed by the Facility Manager.

[5] Notify Shift Supervision.

[6] IF the alarm is unanticipated, THEN Call site ERO by dialing 911 using an MCS office phone or 897-2444 using a cell phone.

WARNING

No re-entry to the area is permitted without Incident Commander and/or Facility Manager permission.

[7] Make the following PA announcement: “We have a Scrubber Room HF Alarm. All unauthorized personnel evacuate the Scrubber Room.”

[8] Notify ES&H there is a possible HF release in the Scrubber Room.

C. Probable Cause

  • HF leak
  • Spurious Alarm - Instrument failure or Signal Transmitter failure
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13
Q

Given a DUF6 Condenser Room HF Leak (Alarm Urgent) alarm, the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0614, section 1.14

A

1.14 (HFR-014) Condenser Room HF Leak (Alarm Urgent)

Description Detects an HF vapor release and provides a signal to BPCS.

Setpoint 3.00 PPM

Trigger AAH-5021 = ALARM [ISS]

A. Automatic Actions

  1. HVA-FN-074 = OFF, HVA-FN-075 = OFF, HVA-FN-076 = OFF, HVA-FN-077 = OFF, HVA-FN-078 = OFF, HVA-FN-079 =OFF

B. Immediate Actions

[1] Ensure all Automatic Actions have occurred.

[2] Ensure the following are closed as indicated on BPCS (all conversion lines shut down):

  • VAP-VAn-1015 (AU-101)
  • VAP-VAn-1025 (AU-102)
  • X-0-CTS-VA-1515 (AU-151)
  • X-0-CTS-VA-1525 (AU-152)
  • X-0-CTS-VA-1502 (CTS CER DUF6 Header Isolation Valve)

DUF6-X-TSR-002, SAC 5.5.3.4 C

[3] Ensure VA1-1012, VA1-1022, VA-1512, VA-1522, VA-1503, VA2-1012, VA2-1022, VA3-1012, and VA3-1022 are OPEN for all cylinders that were feeding.

[4] Initiate an off-normal shutdown of all conversion lines per DUF6-X-OPS-n212, as directed by the Facility Manager.

[5] Notify Shift Supervision.

[6] IF the alarm is unanticipated, THEN Call site ERO by dialing 911 using an MCS office phone or 897-2444 using a cell phone.

WARNING

No re-entry to the area is permitted without Incident Commander and/or Facility Manager permission.

[7] Make the following PA announcement: “We have a Condenser Room HF Alarm. All unauthorized personnel evacuate the Condenser Room.”

[8] Notify ES&H of a Condenser room HF leak.

C. Probable Cause

  • HF leak
  • Spurious Alarm - Instrument failure or Signal Transmitter failure
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14
Q

Given a DUF6 2-CD-502 Condenser High Temp (Alarm Urgent), the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0614, section 1.25
*DUF6 Isolation Interlocks and Reaction Gas Shutoff Interlock

A

1.25 (HFR-025) 2-CD-502 Condenser High Temp (Alarm Urgent)

Description The Condenser is designed to condense the bulk of the HF and steam from the off-gas stream. The Condenser outlet is monitored and a signal is sent to BPCS. This is a Process Interlock that impacts DUF6 processing.

Setpoint 50°C

Trigger X-2-HFR-TI-5021 ≥ 50°C

A. Automatic Actions

  1. Cu-203 DUF6 Isolation and CU-203 Reaction Gas Shutoff

B. Immediate Actions

[1] Ensure all Automatic Actions occur. (See Attachment A and C)

[2] Notify Shift Supervision.

[3] IF directed by Shift Supervision, THEN Refer to DUF6-X-AOP-0002, Recovery from DUF6 Isolation for recovery actions.

[4] IF directed by Shift Supervision, THEN Refer to DUF6-X-AOP-0005, Recovery from DUF6 Shutoff for recovery actions.

[5] Investigate the cause.

C. Probable Cause

  • Reduced CCW flow
  • Spurious Alarm - Instrument failure or Signal Transmitter failure
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15
Q

Given a X-n-HFR-TK-505 High Level (Alarm High), the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0614, section 1.92, 1.93, 1.94 and X-OA-19-003 as needed
*Different actions for Lines 1,2,3

A

1.92 (HFR-092) 1-HFR-TK-505 High Level (Alarm High)

Description HF Receiver Tank high level is monitored (BPCS) to protect against overfilling the HF Receiver Tank.

Setpoint 186 CM (73 inches)

Trigger X-1-HFR-LI-5051 ≥ 186 CM

A. Automatic Actions

NONE

B. Immediate Actions

[1] Notify Shift Supervision.

[2] Ensure Lines 2 and 3 Receiver tanks are not pumping.

[3] Ensure 1-HFR-VA-505D is OPEN.

[4] Ensure 1-HFR-PP-505A/B and 1-HFR-VA-5051 are in AUTO.

[5] Ensure 1-HFR-PP-505A/B amperage.

[6] Ensure a tank in HFS is designated as Primary.

[7] IF needed, THEN Switch HF Receiver pumps per DUF6-X-OPS-1400, HF Recovery (Line 1).

C. Probable Cause

  • 1-HFR-PP-505A and/or 505B has tripped
  • Increased flow of HF
  • Spurious Alarm - Instrument failure or Signal Transmitter failure
  • Tank is not being emptied fast enough
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16
Q

Given a DUF6 HFS Transfer Line Low Air Flow (ISS) alarm, Operations personnel will perform immediate actions in accordance with DUF6-X-OPS-0615, section 1.8

A

1.8 (HFS-008) HFS Transfer Line Low Air Flow (ISS)

Description Air flow in the HF Transfer Line duct is monitored. (Interlock I-7A)

DUF6 -X-TSR-002, TSR 3.3.5 A

Setpoint N/A

Trigger HFS-FSL-5701 (FI-5701) = OFF

A. Automatic Actions

  1. No Interlock – Alarm only

B. Immediate Actions

[1] Notify Supervision.

Note: Wind may cause spurious alarms on air flow. Air flow may already be greater than 30 scfm (51scmh) before the receiver valves can be closed. In this case, Step 1.8 B. [3] should not be performed until the wind gusts subside.

[2] IF HF Transfer Line Air flow is less than 30 SCFM (51 SCMH), THEN Close HF Receiver Tank Isolation Valves immediately (VAn-505D) and Restore air flow to greater than 30 SCFM (51 SCMH) within one (1) hour.

DUF6 -X-TSR-002, TSR 3.3.5 A

[3] Ensure both X-0-HFS-FN-570A and X-0-HFS-FN-570B are in service.

[4] IF actions in Step 1.8 B. [2] are not completed within the required time, THEN Place each conversion line and the HF transfer line in warm standby within four (4) hours.

[5] IF transmitter has failed, THEN Check fan operation every 12 hours.

C. Probable Cause

  • Spurious Alarm – Instrument failure or Signal Transmitter failure
  • HFS-FN-570A and/or HFS-FN-570B have tripped
17
Q

Given a DUF6 Transfer Line Low-Low Air Flow (Alarm Urgent) alarm, the Control Room Operator will perform immediate actions in accordance with DUF6-X-OPS-0615, section 1.25

A

1.25 (HFS-025) Transfer Line Low-Low Air Flow (Alarm Urgent)

Description Air flow is monitored by BPCS on the HF Transfer Line Duct.

Setpoint 51 SCMH (30 SCFM)

Trigger X-0-HFS-FI-5701 ≤ 51 SCMH (30 SCFM)

A. Automatic Actions

  1. HF Receiver Tank Isolation Valves VA1-505D, VA2-505D, VA3-505D = CLOSED

B. Immediate Actions

[1] Notify Facility Manager.

[2] IF HF Transfer Line Air flow is less than 30 SCFM, THEN Ensure HF Receiver Tank Isolation Valves are Closed (VAn-505D) and Restore air flow to greater than 30 SCFM within 1 hour.

DUF6-X-TSR-002, TSR 3.3.5 A

[3] Ensure both X-0-HFS-FN-570A and X-0-HFS-FN-570B are in service.

[4] IF actions in Step 1.25 B [2] are not completed within the required time, THEN Place the HF transfer line in warm standby within four (4) hours.

C. Probable Cause

  • Spurious Alarm – Instrument failure or Signal Transmitter failure
  • HFS-FN-570A and/or HFS-FN-570B have tripped
  • Dirty or plugged air filter/muffler
  • Intake filter may have frozen and restricted the intake flow to blower.
  • High winds have created back pressure on transfer line air flow.

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