ML20151A985

Requests Addl Info Needed to Evaluate Valve Operability Considerations in Accordance W/Ie Bulletin 85-003, Motor- Operated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings

ML20151A985
Person / Time
Site:	Limerick
Issue date:	03/29/1988
From:	Wenzinger E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
References
IEB-85-003, IEB-85-3, NUDOCS 8804070337
Download: ML20151A985 (5)

Text

_ _ _ - - _ _ _ _ _- _. _. . _ _ _ _ ._ __. _ _ . _ _ _ - __ _ - _ _ _ _ ______ __,____ _ _ _ _ _

O 19 MAR 1988 l

Docket No. 50-352 Philadelphia Electric Company ATTN: Mr. John S. Kemper, Sr.

Senior Vice President-Nuclear 2301 Market Street Philadelphia, Pennsylvania 19101 Gentlemen:

Subject:

Additional Information on IEB 85-03 This letter transmits a request for additional information needed by the NRC to evaluate valve operability considerations in accordance with IEB 85-05, "Motor-Operated Valve Common Mode Failures During Plant Iransients Due to Improper Switch Settings."

To facilitate NRC review, we are requesting that you supplement your response to IEB 85-03 with the information identified in the enclosure to this letter.

Please make your submittal within one month of the date of this letter, if practicable. If development and submittal of the information will take longer, please make an hterim submittal in one month, including reasons for the delay and your schsdale for providing the remaining information.

Please send your submittal to the NRC Document Control Desk, with copies to this office and the NRR Division of Operational Events Assessment.

Thank you for your cooperation.

Sincerely,

%Mipod Dr:

~

Edward C. Wenzinger, Chief Projects Branch No. 2 Division of Reactor Projects

Enclosure:

. Request for Additional Information (RAI) 8804070337 0B0329 ~

{DR ADOCK 050 2 h 0FFICIAL RECORD COPY IEB 85-03/ LIM 1 ADDITIONAL INFO - \

0001.0.0 03/29/88

Philadelphia Electric Company 2 g

cc w/ encl; E. C. Kistner, Chairman, Nuclear Review Board Graham M. Leitch, Vice President, Limerick Generating Station J. W. Gallagher, Vice President - Nuclear Troy B. Conner, Jr. , Esquire Eugene J. Bradley, Esquire, Assistant General Counsel W. M. Alden, Director, licensing Section Public Document Room (PDR) local Public Document Room (LPOR)

Nuclear Safety Information Center (NSIC)

NRC Resident Inspector Commonwealth of Pennsylvania bcc w/ encl:

Region I Docket Room (with concurrences)

Management Assistant, DRPA (w/o encl)

Section Chief, DRP Robert J. Bores, DRSS Qv'l ,'

RI:DRP(/M R?:DRP FQ(C William /rhl L'nville htAz nger 3/M/88 3h{/83 3/l /88 (7'

0FFICIAL RECORD COPY IEB 85-03/LIMI ADDITIONAL INFO -

0002.0.0 03/25/88

8 '3 I MAR 7 888

. I a i REQUEST FOR ADDITIONAL INFORMATION (RAI) RE: }

Review of Responses to Action Ites e of IE Bulletin 85-03 1 l i

Licensee Unit (s): Limerick 1,2 I Date of Responses *05-14-86

Philadelphia Electric Company l 2301 Market Street **06-02-86 1 P. O. Box 8699 07-29-86 >

i Philadelphia, PA 19101 10-02-85 l 4

Respondent: '

John S. Kemper, I Vice-President Engineering and Research  !

i

• Unit 2

• • Unit 1 l

I The information proviced in your response to Action Item e of IE Bulletin 85-03 was found to be deficient in some areas. Provide the additional information necessary to resolve the following comments and questions: t l 1. If MOVATS is planned for application to some MOVs which are not (

l included in its data base, commit to and describe an alternate t l method for determining the extra thrust necessary to overcome i pressure differentials for these valves, t t

2. Revise the table of the response dated 10-02-86 to include l values of differential pressure for opening the following MOVs, )

or justify exclusion of these pressures. As required by Action  !

Item a of the bulletin, assume inadvertent equipment {

operations.

! f

(a) HPCI MOV HV-1T004 is sheen normally open in Zone F-3 of j Drawing M-55 Sheet 1 Revision 32, and as MOV 3 on Page 68 of j BWROG Report NEDC-31322 dated Eeptember 1986. How would  !'

] suction from the CST be ensured if this MOV vere to be (a) 4 actuated inadvertently to the closed position upon intended  !

< initiation of the system or (b) left closed inadvertently? l t

j (b) RCIC MOV HV-1F010 is shown normally open in Zone E-2 of q Drawing M-49 Sheet 1 Revision 28, and as MOV 3 on Page 72 of ,.

the BWROG Report. The question in Item 2(a) above applies t

here also.

! i i

i  !

i d

I

l

, MAR 7 1983 Page 2 of 3 RAI for Limerick 1,2 y (c) HPCI MOV HV-1F072 is shown normally open in Zone C-6 of

! Drawing M-55 Sheet 1 Revision 32, and as MOV VI on Page 71 I

of the BWROG Report. How would exhaust from the turbine to ,

the suporession pool be ensured if this MOV vere to be-(a) actuated inadvertently to the closed position upon intended

, initiation of the system or (b) left closed inadvertently?

(d) RCIC MOV HV-1F060 is shown normally open in Zone B-5 of

)

Drawing M-49 Sheet 1 Revision 28, and as MOV VI on Page 74 '

of the BWROG Report. The question in Item 2(c) above ,

applies here also.

3. Revise the table of the response dated 10-02-86 to include MOVs HV-124 and HV-125, or justify their exclusion. These valves are shown normally open in series in Zone H-6 of Drawing M-55 Sheet 1 Revision 32. Similar valves are not identified in the BWROG Report. How would suction to the BPCI and RCIC systems be ensured if one of these valves were to be (a) actuated inadverter.tly to the closed position upon intended initiation of the systen or (b) left closed inadvertently?

4. Resolve a discrepancy in the table of the response dated 10-02-86, for the following two HOVs with similar functions. r Also consider the effect of Note o on Page 66 of the BWROG l Report about providing differential pressures for test valves.

(a) HPCI MOV HV-1F007 is shown normally open in Zone D-4 of Drawing H-55 Sheet 1 Revision 32, and as MOV 8 on Page 68 of the BWROG Report. Differential p essure is given for opening only.

(b) RCIC MOV HV-1F012 is shown normally open in Zone D-4 of 6 I Drawing M-49 Sheet 1 Revision 28 and as MOV 8 on Page 72 of the BVROG Report. Differential pressure is given for closinn only. Hov vould injection to the reactor vessel be

)

ensured if this valve were to be (a) actuated inadvertently to the closed position upon intended initiation of the system or (b) left closed inadvertently? L

5. Revise the table of the response dated 10-02-86 to include RCIC l Trip and Throttle Valve HV-112, or justify its exclusion. This valve is shown as a MOV on FSAR Figure 5.4-9 Revision 43, 05/85, and as MOV I on Page 74 of the BWROC Report.

l

Page 3 of 3 i RAI for Limerick 1,2

6. The proposed program for action items b, c, and d of the bulletin is incomplete. Provide the following details at a minimum:

(a) commitment to justify continued operation of a valve determined to be operable, (b) description of a method possibly needed to extrapolate valve stem thrust determined by testing at less than maximum differential pressure, (c) consideration of pipe break conditions as required by the bulletin, and (d) stroke testing when necessary to meet bulletin requirements,