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LOT > 201.21 Containment Isolation > Flashcards

201.21 Containment Isolation Flashcards

1
Q
  • 201.21 Containment Isolation*
    • *

What are the Fission Product Boundaries

A

Fuel Cladding

RCS

Containment Building

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2
Q
  • 201.21 Containment Isolation*
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Function of an ESF System

A

Control and Limit the release of fission products to prevent exceeding 10CFR50.67 limits following a LOCA or fuel handling accident

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3
Q
  • 201.21 Containment Isolation*
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Function of Containment Isolation System

A

Preserves integrity of the containment boundary, preventing/limiting releases of fission products to the environment during a LOCA or fuel handling accident.

Isolates non-essential fluid lines while allowing passage of others to important systems under emergency conditions.

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4
Q
  • 201.21 Containment Isolation*
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3 types of lines that require isolation

A

Form part of RCS Pressure Boundary

Connect directly to containment atmosphere

Part of a closed system

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5
Q
  • 201.21 Containment Isolation*
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Types of Containment Penetrations

A

Piping

Electrical

Fuel Transfer Tube

Personel / Aux Airlock

Instrumentation

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6
Q
  • 201.21 Containment Isolation*
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Piping Penetrations

A

Single line per penetration for high energy lines

( > 200 F or 225 psig)

Multiple pipes for low energy

Sleeve welded to RCB wall, plate welded to sleeve and pipe

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7
Q
  • 201.21 Containment Isolation*
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Electrical Penetrations

A

Multiple Canister Type

Canister welded to RCB wall, electrical assembly flanged to canister

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8
Q
  • 201.21 Containment Isolation*
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Fuel Transfer Tube

A

Blind flange IRC

Manual locked closed valve ORC

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9
Q
  • 201.21 Containment Isolation*
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Airlocks

A

Inner and Outer Doors

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10
Q
  • 201.21 Containment Isolation*
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Instrumentation

A

Bellows IRC, fluid filled tube through wall, diaphragm / transmitter ORC

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11
Q
  • 201.21 Containment Isolation*
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Types of Containment Isolation

A

Phase A

Phase B

Main Steamline Isolation

Feedwater Isolation

Containment Ventilation Isolation

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12
Q
  • 201.21 Containment Isolation*
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Phase A Isolation

A

Actuated by:

SI

Manually from MCR

Isolates valves in systems not needed to support safety systems

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13
Q
  • 201.21 Containment Isolation*
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Systems affected by Phase A

A

All Sample lines (CP-002)

CVCS Letdown and Charging

CVCS Seal Water Supply and Return

RCDT Vent and Discharge

RCB Normal Sump Discharge

Air supply to PAL solenoids

PRT Vent and Spray

SIS Accumulator Test and N2 Supply

RCB Chill Water

IA to RCB

FP to RCB

Normal and Supplemental Purge

◦Also Containment Radiation Monitors (RT-8011, 8012 & 8013

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14
Q
  • 201.21 Containment Isolation*
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Phase B Isolation

A

Actuated by:

Hi-3 Conatinment Pressure 9.5 psig

Manually from MCR

(2/2 on 1 of 2 sets of switches, CP-005, CP-002)

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15
Q
  • 201.21 Containment Isolation*
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Main Steam Line Isolation

A

Actuated by:

Low Steam Pressure < 735 psig (2/3 any S/G)

Hi-2 Containment pressure 3.0 psig

Hi Steam Pressure Rate 100 psig (instant) or 100 psig/50 sec below P-11 (< 1985# RCS) with Lo Steam Line Pressure SI blocked

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16
Q
  • 201.21 Containment Isolation*
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Feedwater Isolation

A

Actuated by:

SI

S/G Level Hi-Hi (P-14) >87.5%, 2/4 on 1 S/G

Rx Trip (P4) and lo Tave (574 F)

17
Q
  • 201.21 Containment Isolation*
    • *

Containment Ventilation Isolation

A

Actuated by:

Hi Rad in RCB Purge Exhaust (Norm or Supp)

SI

Manual - 1/2 Phase A/CVI switches in MCR

2/2 on 1/2 Containment Spray Actuation Switches

18
Q
  • 201.21 Containment Isolation*
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Systems affected by a Phase B

A

6 CCW valves to/from RCPs (2 inlet, 4 outlet)

19
Q
  • 201.21 Containment Isolation*
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Systems affected by a Maint Steam Line Isolation

A

All MSIVs and MSIV Bypass Valves

20
Q
  • 201.21 Containment Isolation*
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Valves affected by Feedwater Isolation

A

Feedwater Reg Valves

Feedwater Bypass Reg Valves

Feedwater Isolation

Feedwater Isolation Bypass

Feedwater Pre-heater Bypass Valves

21
Q
  • 201.21 Containment Isolation*
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Systems affected by Containment Ventilation Isolation

A

Normal and Supplemental Purge

8011

22
Q

Tech Specs

A
  1. 6.1.1 Containment Integrity
  2. 6.1.2 Containment Leakage

Without Integrity or leakage exceeding limits, restore in 1 hour, or be in Mode 3 in 6 hours, and Mode 5 30 hours later.

23
Q
  • 201.21 Containment Isolation*
    • *

Instrumentation and Controls Available to Monitor and Operate Containment Isolation

A

ESF Status Monitoring Bypass/Inop and F/Act lights

Phase A and B - CP-002

MS and FW - CP-006

CVI - CP-022

LOT (20 decks)

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