ML18009A856
| ML18009A856 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 04/04/1991 |
| From: | Floyd S CAROLINA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NLS-91-077, NLS-91-77, NUDOCS 9104100025 | |
| Download: ML18009A856 (4) | |
Text
ACCELERATED D. TRIBUTION DEMONSTRATION SYSTEM
<i (4'EGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:9104100025 DOC.DATE: 91/04/04 NOTARIZED: NO FACIL:50-400 Shearon Harris Nuclear Power Plant, Unit 1, Carolina AUTH.NAME AUTHOR AFFILIATION FLOYD,S.D.
Carolina Power 6 Light Co.
RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
DOCKET 05000400
SUBJECT:
Forwards addi Request for Relief CVCS RV-3 from inservice pump 6 valve testing program to permit CVCS charging pump inlet header check valve to be partial stroke exercised at cold shutdown 6 full stroke exercised at refueling.
DISTRIBUTION CODE:
RO47D COPIES RECEIVED:LTR ENCL Q SIZE: +
TITLE: OR Submittal: Inservice Inspection/Testa.
g/Relief from ASME Code NOTES:Application for permit renewal filed.
05000400 RECIPIENT ID CODE/NAME PD2-1 LA BECKER,D INTERNAL: ACRS NRR/DET/ECMB 9H NUDOCS-ABSTRACT OGC/HDS1 RES/DSIR/EIB EXTERNAL: EGGG BROWN,B NRC PDR COPIES LTTR ENCL 1
0 2
2 6
6 1
1 1
1 1
0 1
1 1
1 1
1 RECIPIENT ID CODE/NAME PD2-1 PD AEOD/DSP/TPAB NRR/DET/EMEB 7E OC ~EH G~~
EG&G RANSOMEi C NSIC COPIES LTTR ENCL 1
1 1
1 1
1 1
0 1
1 1
1 1
1 NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!
TOTAL NUMBER OF COPIES REQUIRED:
LTTR 22 ENCL 19
SNK Carolina Power & Light Company APR O4 199]
United States Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, DC 20555 SERIAL:
NLS-91-077 10CFR50.55a SHEARON HARRIS NUCLEAR POWER PLANT DOCKET NO. 50-400/LICENSE NO. NPF-63 IN-SERVICE PUMP AND VALVE TESTING PROGRAM RELIEF REQUEST Gentlemen:
Carolina Power
& Light Company (CP&L) hereby submits for review an additional relief request to the Shearon Harris Nuclear Power Plant (SHNPP)
In-Service Testing (IST) Program as approved by NRC on September 29, 1988.
The SHNPP IST program requires that check valve 1CS-294, in the refueling water storage tank supply line to the charging pumps supply header, be full flow tested at cold shutdown.
(see Chemical
& Volume Control System CVCS CS-5).
Full flow testing would necessitate the injection of large quantities of borated water into the Reactor Coolant System (RCS).
In the course of reviewing and implementing the IST program, it was determined that implementation of the full flow cold shutdown testing of valve 1CS-294 could result in challenging the RCS Cold Overpressure Protection System since inadequate expansion volume exists in the RCS to accommodate full flow testing of the check valve.
Therefore, the attached relief request (CVCS RV-3) identifies alternate testing for check valve 1CS-294, i.e., partial stroke exercising at cold shutdown and full stroke exercising at refueling.
Relief request CVCS RV-3 is similar to previously approved relief SI RV-1 with regard to the basis for not full flow testing at power or at cold shutdown, and is consistent with the basis for not partial flow testing at power as identified in the Technical Evaluation Report accompanying the IST program approval ment:ioned above.
The Shearon Harris Nuclear Power Plant is now in a refueling outage.
Check valve 1CS-294 can and will be full flow tested, without the potential of challenging the RCS pressure
- boundary, during this refueling outage.
- However, CP&L requests prompt NRC review and approval of this request so that a program conflict can be avoided should SHNPP experience a cold shutdown subsequent to this refueling out:age.
Please refer any questions regarding this submittal to Mr. Steven Chaplin at (919) 546-6623.
SDF/SDC Attachment cc:
Mr. R. A. Becker Mr. S.
D. Ebneter Mr. J.
E. Tedrow Yours very truly,
~3 K+'anager Nuclear Licensing Section 411 Fayettevitte Street o P. O. Box 1551 o Raleigh, N. C. 27602 i
9i04i0002S 9i0404 PDR ADOCK 05000400 P
PDR Q)'
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Enclosure to NLS-91-077 RV-3 System:
Valve:
Class:
Function:
RWST Line to CVCS Charging Pump Inlet Header Check Valve Test Requirement:
Basis for Relief:
Verify forward flow operability.
Verification of forward flow operability can only be performed by injecting RWST water into the RCS.
While at power, the charging pumps have insufficient head to overcome normal RCS operating pressure for a full flow test.
Partial stroke exercising while at power would adversely affect RCS boron concentration and could lead to a reactivity transient.
Full, forward flow verification at cold shutdown could result in a cold overpressurization of the RCS.
The only time that there is sufficient RCS expansion volume is during refueling while the reactor vessel head is removed.
Alternate Testing:
Valve will be partial stroke exercised at cold
.shutdown and full stroke exercised at refueling.
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