Containment

Question 1

What are the functions of Containment?

Answer 1

• Limits the release of fission products
• Provides biological shielding for personnel protection during normal and accident conditions
• Provides source of water for recirc

Question 2

What is the purpose of the Divider Barrier?

Answer 2

Prevents flow of steam and air from bypassing the ice condenser. ENSURES STEAM FLOWPATH IS THROUGH ICE CONDENSER DURING LOCA

Question 3

What actuates a Cntmt Vent Isolation [CVI]?

Answer 3

• SI (1# in Lower Ctmnt)
• High Radiation
• Manual Phase A switch
• Manual Phase B switch
• Manual

Question 4

What Hydrogen concentration do the Hydrogen Recombiners maintain?

Answer 4

< 4%

Question 5

Per T.S. 3.6.5 (Containment Air Temps), what are the temperature limits in containment?

Answer 5

• Upper 60°F-100°F
• Lower 60°F-120°F

Question 6

Can you enter through the INOPERABLE Ctmnt doors to do repairs if you are in TS 3.6.2 (Containment Airlock) for doors being INOPERABLE?

Answer 6

Yes
Entry and exit of containment is
permissible under the control of
a dedicated individual.

Normal entry/exit only for7 days under if both air locks are inop

Question 7

If Divider Barrier Seal Integrity is lost (One or more personnel access doors or equipment hatches open or inoperable) how long do you have to get it back? (TS 3.6.13 A)

Answer 7

restore to OPERABLE and closed WITHIN 1 hr

Question 8

If the Cntmt Recirc Drains are INOPERABLE, how long do you have to restore them? (TS 3.6.14)

Answer 8

Within 1 hr

Question 9

What causes a Phase A Isolation?

Answer 9

• 2/3 Lower Containment pressures ≥ 1 psig
• SI
• Manual

Question 10

What causes a Phase B Isolation?

Answer 10

• 2/4 Lower Containment Pressures ≥ 2.8# in Lower Ctmnt
• Manual

Question 11

Per TS 3.6.2 A (Airlock), what do you do it One or more ctmnt air locks with one or more cmnt air lock doors are inoperable?

Answer 11

Verify the Operable door is closed in the affected air lock WITHIN 1 hr

Question 12

Per TS 3.6.1 A (Ctmnt), what do you do if Containment becomes INOPERABLE?

Answer 12

restore to operable WITHIN 1 hr

Question 13

How many Refueling Canal Drains must be operable?

Answer 13

2 of the 3 Refueling Canal Drains must be operable

Question 14

How are the Refueling Canal Drains sized?

Answer 14

Allows sufficient flow back to the recirc sump and minimizes steam bypassing the Ice Condenser

Question 15

Per TS 3.6.3, Condition B (Ctmnt Isolations), what must be done if 1or more penetration flow paths with 2 containment isolation valves INOPERABLE?

Answer 15

Isolate flow path with blind flange, manual valve or closed/deenergized automatic valve WITHIN 1 hr

Question 16

When are all access hatches through the barrier closed in Containment?

Answer 16

When RCS > 200°F

Question 17

Per TS 3.6.2 B (Airlock), what must be done when one or more ctmnt air locks with ctmnt air lock interlock mechanism is inoperable?

Answer 17

Verify an Operable door is closed in the affected air lock WITHIN 1 hr

Question 18

Per TS 3.6.2 C (Airlock), what must be done if one or more ctmnt air locks is inoperable for reasons other than Condition A or B?

Answer 18

IMMEDIATELY:
- Initiate action to evaluate overall ctmnt leakage rate per LCO 3.6.1
AND
- Verify a door is closed on the affected air lock WITHIN 1 hr

Question 19

Per TS 3.6.4 A (Ctmnt Pressure), what must be done if Containment pressure is not within limits?

Answer 19

Restore ctmnt # to within limits WITHIN 1 hr

Question 20

Per TS 3.6.12 A (Ice Condenser Doors), what must be done if One or more condenser inlet doors are inoperable due to being physically restrained from opening?

Answer 20

Restore inlet doors to operable status WITHIN 1 hr

Question 21

Per TS 3.6.13 B (Divider Barrier), what must be done if the Divider Barrier Seal is INOPERABLE?

Answer 21

Restore to operable WITHIN 1 hr

Question 22

Per TS 3.6.14 A (Ctmnt Recirc Drains), what must be done if One ice condenser floor drain is INOPERABLE

Answer 22

Restore ice condenser floor drain to Operable status WITHIN 1 hr

Question 23

Per TS 3.6.14 B (Ctmnt Recirc Drains), what must be done if One required refueling canal drain is INOPERABLE?

Answer 23

Restore required refueling canal drain to Operable status WITHIN 1 hr

Question 24

Per What does TS 3.6.14 C (Ctmnt Recirc Drains), what must be done if One required CEQ fan room drain is INOPERABLE?

Answer 24

Restore required CEQ fan room drain to Operable status WITHIN 1 hr

Question 25

Per TS 3.6.14 D (Ctmnt Recirc Drains), what must be done if One flood-up overflow wall flow path is INOPERABLE?

Answer 25

Restore flood-up overflow wall flow path to Operable status WITHIN 1 hr

Question 26

Why do we use Sodium Tetra-borate in the ice in the ice condenser?

Answer 26

To keep iodine in solution post accident (keeps water at high pH)

Question 27

How much pressure is needed to open the lower deck doors to the ice condenser?

Answer 27

1 lb per square foot

Question 28

What does the Ctmnt Penetration and Channel Pressurization System do for us and which one is still in service?

Answer 28

• Zone 3, Electrical Penetrations is still in service
• It maintains positive pressure on the containment electrical penetrations to prevent moisture intrusion.

Question 29

Which radiation monitors close INSIDE ctmnt isolation valves?

Answer 29

Odd numbered Radiation monitors close 100 series (inside ctmnt iso valves) and CIPS Fan

Question 30

Which radiation monitors close OUTSIDE ctmnt isolation valves?

Answer 30

Even numbered Radiation monitors close 200 series (Outside ctmnt iso valves) and rest of Ctmnt Vet Supply Fans

Question 31

What are the RCS leak detection monitors in ctmnt per TS 3.4.15 (RCS Leakage Detection Instrumentation

Answer 31

• 1 containment sump monitor in each sump
• 1 containment atmosphere particulate radioactivity monitor; and
• 1 containment atmosphere gaseous radioactivity monitor

Question 32

What is the basis for the high and low containment temperature limits?

Answer 32

• HI Temp Limit: equipment concerns
• Low Temp Limit: more mass still remain < 12#

Question 33

What is the Basis for the containment pressure limitations?

Answer 33

• High Limit: keeps us below design limit of 12#
• Low Limit ensures that the design neg diff pressure is not exceeded and to ensure assumptions made in the blowdown phase of the LBLOCA anaylis remain valid

Question 34

What are the tech spec pressure bands for containment?

Answer 34

-1.5 psi - +0.3 psi

Question 35

Where are the requirements for the containment Leak Rate Testigng Program (SR 3.6.11 and 3.6.2.1) discussed?

Answer 35

TS 5.5 lists programs to be established, implemented and maintained

Question 36

What is required for a containment airlock to be OPERABLE?

Answer 36

• Interlock must work
• must be in spec for leakage test
• both air lock doors must be OPERABLE
• Both air lock doors should be closed except for normal entry and exit

Question 37

Per section 5.5.14, Containment Leakage Rate Testing Program, what is containment leakager rate acceptance criterion?

Answer 37

1.0 La

Question 38

If the plant is in cold shutdown and preparations are in progress for plant heatup/startup but upper contaiment average temp is > 100F, and a risk assessment has not been performed, can the plant heat up?

Answer 38

NO. TS ACTIONS do not allow for unlimited operation when containment average air temp in the upper CTMT is >100F