ML20040C458
| ML20040C458 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 11/20/1981 |
| From: | Foster D GEORGIA POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-SSINS-6820 IEB-81-02, IEB-81-2, NUDOCS 8201270665 | |
| Download: ML20040C458 (6) | |
Text
.t Georgia Power Company USNR0 REGION ;
Post Offico Box 4545 ATL ANTA. GEO r' ^,1L Atlanta, Georgia 30302 Telephone 404 522-6060 8 I f10V 2+
T' 2 3 l Vogtle Proj.ect Southern Company ServtCos, Inc.
g Post Office Box 2625 g
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Birmingham, Alabama 35202 Telephono 205 87(MK)11 b
g November 20, 1981 RfCffyED
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c United States Nuclear Regulatory Commissica Referen e:
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Office of Inspection and Enforcement RII:
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Region II - Suite 3100 50-424 101 Marietta Street 50-425 Atlanta, Georgia 30303 Attention: Mr. James P. O'Reilly File:
X7BC24 Gentlemen:
The following is submitted in response to your letter dated August 18, 1981, requesting infonnation concerning IE Bulletin 81-02 Supplement.
The attached table lists the Westinghouse EMD valves to be used at Plant Vogtle. The table includes all of the infonnation requested in your supplement.
A Westinghouse Engineering review is scheduled to begin in January, 1982 for Unit 1 and April,1982 for Unit 2.
Modifications to the affected valves are scheduled for July, 1982 and any exchange of hardware from Westingnouse EMD inventory is scheduled for November,1982. All action should be completed on these valves by December 31, 1982.
This reply contains no p'roprietary information and may be placed in che NRC's Public Document Room.-
Very truly yours,
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. O. Foste Project General Manager CWH:tlp 8201270665 811120 PDR ADOCK 05000424 PDR G
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Mr. J. P. O'Reilly 50-424, 50-425 November 20, 1981 page 2.
D. O. Foster states that he is Project General Manager of Georgia Power Company's'Vogtle Project and is authorized to execute this oath on behalf'of Georgia Power Company and that to the best of his knowledge and belief the facts set forth in this letter are true.
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GPC:
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D. O. Foster Sworn..to and subscribed before me this d# # day of November, 1981.
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% PubNC.Oecrgfa.Stata et large My Commission Expires March 21.1995 xc:
U. S. Nuclear Regulatory Commission Attn: Victor J. Stello, Jr. Director Office of Inspection and Enforcement Washington, D.C.
20555 J. H. Miller, Jr.
D. E. Dutton R. J. Kelly H. H. Gregory III R. E. Conway E. D. Groover G. F. Head L. T. Gucwa R. H. Pinson B. L. Lex C. F. Whitmer C. R. Miles, Jr.
D. L. McCrary H. C.~ Nix l
R. A. Thomas R. W. Staffa J. A. Bailey J. L. Vota
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MAXIMUM P-(psi) AS FLOW APPROACHES ZERO 2
VALVE W EMD FINAL VALVE LOCATION MODEL EQUIP.
FUNCTIONAL FUNCTION NUMBER REFERENCE SPEC REQUIREMENT CONSEQUENCES OF FAILURE TO CLOSE VCT 0utlet LCV-ll2 B,C~
4GM72FB 200 100 Two valves.in series; Failure of either-valve to close reduces redundancy of providing isolation. Alternate valve will provide isolation.
RWSI to LCV-ll2 D,E 8GM72FB 200 200 One MDV in each of two paralled paths Suctior from the RWST to suction of the CCP's; of CCP's failure reduces redundancy of.providing i
isolation of RWST during recirculation phase following a LOCA. Isolation will be provided by a check valve in series with the two paths.
t CCP 8471 A,B 6GM72FB 200 200 Valve is used for charging pump train i
Suction isolation following a MSLB or HELB Isolation during boration. Boration-can continue following failure of one valve to-close by closing the other valve.
CCP Dis-8485 A,8 4GM78FN 2750 100 One valve in discharge line for each charge 8438 4GM78FN 2750 100 charging-pump plus one valve in dis-Isolation charge header; following'HELB, isolation,
of charging pump would occur by closing valve indischarge line.
Isolation of line break is still possible following failure of valve to close by closing valve in discharge header.
RHR Suction 8701 B 12GM88SE 700 700 Two valves in series; failure of inner
. Isolation 8702.B 12GM88SE 700 700 isolation valve to close reduces re-Inner dundancy of providing isolation. Isolatior ~
is provided by closing outer valve.
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MAXIMUM P (psi) AS FLOW APPROACHES ZERO VALVE W EMD FINAL VALVE LOCATION MODEL EQUIP.
FUNCTIONAL FUNCTION NUMBER REFERENCE SPEC REQUIREMENT CONSEQUENCES OF FAILURE TO CLOSE RHR Suction 8701 A 12GM88SE 700 700 Same as inner, except isolation is Isolation, provided by closing inner valve.
Outer 8702 A 12GM88SE 700 700 RHR Discharge Cross Connect 8716 A,B 8GM74FE 700 300 Failure of valve to close reduces re-dundancy of providing low head train separation during CL recirculation phase following a LOCA. Train separation can be achieved by closing other valve.
RHR HX 8804 A 8GM74FE 700 300 Valve is opened for recirculation phase Discharge following a LOCA. Failure of valve to to Suction close precludes realignment of RHRS for normal operation.
RHR HX 8804 8 8GM74FE 700 300 Same as RHR HX Discharge to Suction Discharge to SI Pump Suction RWST to 8806 8GM72FB 200 200 Valve is closed for recirculation phase SI Pump following a LOCA.
If valve fails to Suction close, backflow into RWST is prevented by check valve in line.
CCP Suction 8807 A,B 4GM72FB 200 200 Two valves in parallel (8807 A,B) in to SI Pump series with one valve (8924); failure Suction 8924 4GM72FB 200 200 of any one valve to close will not Crossover preclude isolation.
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MAXIMUM P (psi) AS FLOW APPROACHES ZERO VALVE W EMD FINAL VALVE LOCATION MODEL EQUIP.
FUNCTIONAL FUNCTION NUMBER REFERENCE SPEC REQUIREMENT CONSEQUENCES OF FAILURE TO CLOSE Accumulator 8808 A,B,C,D 10GM88FN 2750 0
Valve is closed to prevent RCS pressur-Discharge ization during cold shutdown operations.
If the valve fails to close, the s
accumulator may be depressurized by venting the N2 to the containment.
R.HR Pump 8809 A,B 8GM78FN 2750 200 Valve is closed for switchover from CL CL Injection to HL recirculation.
Failure of valve to close will degrade fow to HL's.
RWST to RHR 8812 A,B 12GM74FE 700 100 Same as RWST to SI Pump Suction.
Pump Suction Sump Suction 8811 A,B 14GM74FE 700 100 Valve is opened for recirculation following a LOCA. Valve would be closed for containment isolation. Valve is en-capsulated within a protective housing which acts as the redundant containment isolation.
SI Pump Discharge Cross Connect 8821 A,B, 4GM77FH 1500 1500 Valve is closed for switchover from CL to HL recirculation.
If valve fails to close, alternate isolation valve 8885 can be closed.
RHR HX 8840 12GM78FN 2750 200 Valve is closed for switchover from HL Discharge to CL recirculation following a LOCA.
to HL If valve fails to close, isolation is provided by closing the RHR discharge cross connect valves.
SI Pump.
8923 A,B 6GM72FB 200 200 Valves are closed to provide SI pump train Suction separation.
Two valves are present; failure Cross Connect of one vlave to close will not preclude achieving separation.
MAXIMUM P (psi) AS FLOW APPROACHES ZERO VALVE W EMD FINAL VALVE LOCATION MODEL EQUIP.
FullCTIONAL FUNCTION t' UMBER REFERENCE SPEC REQUIREMENT CONSEQUENCES OF FAILURE TO CLOSE Spray Additive 8994 A,B 3GM52FB 200 100 Valve is opened to add Na0H during spray l
Tank Gravity injection and closed for spray recir-1 Discharge culation.
If the valve to clore, a small I
amount of N2 could be contained in the I
spray with negligible effect on system operation or safety.
Spray Pump 9001 A,B SGM74FE 700 200 Valve is closed following cessation of Discharge spray. Containment isolation is assured by presence of check valve. (IRC).
I 200 Two valves in series; valves are closed Pump 9002 A,B 10GM72FB 200 Suction 9003 A,B 10GM72FB 200 200 following cessation of spray.
Failure of one valve to close does not preclude l
isolation.
RWST to 9017 A,B 10GM72FB 200 100 Valve is closed for recirculation phase I
Spray Pump following a LOCA.
If valve fails to Scution close, backflow into RWST is prevented by check valve in line.
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