ML20099B974

Temporary Procedure Secondary Containment Preventative Maint Program

ML20099B974
Person / Time
Site:	Quad Cities
Issue date:	07/27/1992
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20099B972	List: ML20099B969 ML20099B974
References
PROC-920727, NUDOCS 9208030196
Download: ML20099B974 (4)

Text

TEMPORARY PROCEDURE SECONDARY CONTAINMENT FREVENTATIVE MAINTENANCE PROGRAM i

i A. PURPOSE The purpose of this program is to provide a method for the periodic inspection of the Secondary Containment and guidelines on maintenance performed during the operating cycle. This program is a commitment resulting from the Level IV violation received in NRC Inspection Report 50-254/91017; 50-265/91013.

B. REFERENCES

1. Nuclear Licensing Administrator letter dated August l '. , 1991 to Bert 1 Davis of the NRC.

2. Notice of violation - NRC inspection reports no. 50-254/91917; 50-265/91013 dated Sep 24, 1991, j 3. LER 91-11/ DVR 04-01-91-102 I

4. Response to NOV for NRC Inspection Reports 50-254/91017; 50-265'/91013 dated October 25, 1991.

5. " Secondary Containment Capability Test", QTS 160-5.

C. PRECAUTIONS

1. None.

D. PREREOUISITES 1 None.

E. LIMITATIONS AND ACTIONS

1. Items on the Secondary Containment Preventative Maintenance Inspeccion Checklist may be evaluated as not applicable due to reasons of accessibility, ALARA, or other.

2. When performing leakage evaluations, inspect the as-found condition

. of the component in question and compare that to the results of the most recently completed secondary containment test in which a leak was induced. This will provide comparative data for allowable secondary containment inleakage. Items evaluated as below the threshold of impacting the secondary containment integrity may be recaired without performing a Secondary Containment Test.

Page 1 9208030196 920727 PDR ADOCK 05000254 P PDR

I. l TEMPORARY PROCEDURE

F. PROCEDURE

1. Verify the operability of the Reactor Puilding interlock doors by performing the following:

CAUTION If an interlock malfunctions allowing a breach of secondary containment, then immediately close the doors and notify the Shifc Engineer,

a. Open one door at a time at each interlock location specified on the Secondary Containment Preventative Maintenance Inspection Checklist and verify the other door (e) cannot be opened.

2. Inspect the integrity of the Secondaly Containment penetrations listed in steps a through b of Secondary Containment Preventative Maincenance Inspection Checklist by performing the following:

a. Inspect each penetration for excessive air in.2akaga and/or degraded seals. Items of concern include rubber door seals, door sweeps, and missing or degraded seal material. The amount of air inleakage can be qualitatively measured by using a smoke generator (smoke tube SI# 853025). Some air inleakage is expected through the interlock doors.

b. Components that exhibit questionable integrity are to be documented on the As-Found Condition Evaluation Checklist and forwarded to the Technical Staff system engineer to be dispositioned.

I

c. The Technical Staff system engineer shall complete the As-Found Condition Evaluation Checklist for components with questionable leakage.

1. If the item (s) are evaluated as below the threshold to impact secondary containments ability to perform its safety function, then a work request should be generated to correct the problem.

2. If the item (s) are evaluated as above the threshold to impact secondary containment's ability to perform it's safety function, then immediately notify the Shift Engineer. In this event, QTS 160-5, " Secondary Containment Capability Test",

shall be performed to verify secondary containment integrity.

l H. CHECKLISTS

1. Attachment A, As-Found Condition Evaluation Checklist.

, 2. Attachment B, Secondary Containment Preventative Maintenance Inspection Checklist. ,

(final) 1 1

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, ATTACHMENT A TEMPORARY PROCEDURE AS-FOUND CONDITION EVALUATION CHECKLIST i

1. Item (s) to be evaluated:

2. As found condition of item (s) (include dimensions):

4 l 3. Data from most recent performance of the Gecondary Containment Capability Test:

l

{ Test Date / /

4 Reactor Buildir.g Differential Prese' Ire before induced leak (approximately a

four inch hole), inches H2O vacuum 1

l Reactor Building Differential Pressure

after induced leak. inches H2O vacuum 4

Current margin between the induced leak

. differential pressure and the Technical Specification limit. inches H2O vacuum

4. Is the magnitude of the as-found or degraded condition larger or i

smaller than the size of the induced leak from the last test? (Explain) 4 4

, S. Final Evaluation of identified item (s). Include Work Request numbers as applicable.

Performed By: /

Technical Staff System Engineer Date J

Reviewed By: / 1 Technical Staff Suoervisor

' Date (final)

ATTACBMENT B TEMPORARY PROCEDURE SECONDARY CONTAINMENT PREVENTATIVE MAINTENANCE INSPECTION CHECKLIST A. DISCUSSION s

This preventative maintenance program incorporates a periodic walkdown of Secondary Cc. .inment boundaries that are likely to wear or degrade through an operating cycle. This checklist is to be completed three times per year (every 3-5 months). The items included on-this

, checklist may be inspected in any order. This checklist should not be considered all inclusive. Other items may be inspected at the

inspector's discretion.

The inspection should focus on excessive air inleakage and/or degraded seals. All interlock doors will be verified to be functioning i properly. Open one door at a time at each interlock location and verify the other door (s) cannot be opened. If an interlock malfunctions al. lowing a breach of secondary containment, then

. itamediately close the doors and notify the Shif t Engineer. If any items are found to be unsatisfactory, notify the Technical Staff system engineer to perform an evaluation of the as-found condition on Attachment A.

, The three categories of evaluation are satisfactory (S AT) ,

unsatisfactory (UNSAT), and not applicable (N/A). Items on the -

i inspection checklist may be evaluated as not applicable due to reasons of accessibility, ALARA, or other, i

( B. CHECKLIST Interlock Door Evaluation Init/Date i 1 U-1 595' El. Turb Bldg Side by RFP Area RK Bldg Side /

To HRSS Comments:

z 2 U-2 595' El. Turb Bldg Side by RFP Area Rx Bldg Side /

To HRSS l Comments

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a g

e *

, . ATTACHMENT B TEMPORARY PROCEDURE Interlock Door Evaluation Init/Date 3 U-1/2 EDG Rx Bldg Side Access Area U-1/2 EDG Side /

1/2 Trackway Outside Comments:

4 U-1/2 Door to Rx Bldg Side Turb Bldg Roof TB Roof Side /

Comments:

5 U-1 HPCI Room HPCI Room Side Access Elevator Side /

Comments:

6 U-1 MSIV Room MSIV Room Side ~

Access Turb Bldg Side j /

Comments:

7 U-2 MSIV Rcom MSIV Room Side Access Turb Bldg Side /

Comments:

8 U-1/2 647 El. Turb Bldg Side 480V SWGR U-1 Rx Bldg /

BUS 18 (28) U-2 Rx Bldg Conments:

I 9 U-1 DW Purge Fans , llampers , N/A /

& Filter Access

Doors Comments

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s . ATTACHMENT B TEMPOTM J PROCEDURE Interlock Door Evaluation Init/Date 10 U-2 DW Purge Fans, Dampers, N/A /

& Filter Access Doors Comments:

11 U-1 Rx Bldg Supply Vent Isol Damp Edaust /

Comments:

12 U-2 Rx Bldg Supply Vent Isol Damp Edaust /

Comments:

13 U-1/2 Equip Rx Bldg Side Access-RR Doors Outside /

Comments:

14 U-1 MSL Boot / A MSL Seal D Htr Bay B MSL /

C MSL D MSL Comments:

) 15 U-2 MSL Boot / A MSL Seal D Htr Bay B MSL /

C MSL D MSL Comments:

16 U-1 D Heater Bay - General N/A /

Area

(

Comments:

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, ATTACHMENT B TEMPORARY PROCEDURE Interlock Door Evaluation Init/Date 17 U-2 D Heater Bay - General N/A Area /

Comments:

18 U-1/2 690' El.

Blow-Off Side N/A /

Panels Comments:

19 SBGTS Access Hatch Near MO N/A /.

1/2-7507-A,B Comments:

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.I (final)

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