ML20066H670
| ML20066H670 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 02/14/1991 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20066H678 | List: |
| References | |
| 91-057, 91-57, IEB-88-004, IEB-88-4, NUDOCS 9102210237 | |
| Download: ML20066H670 (3) | |
Text
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f NIHOINIA ELECTIllC AND POWT lt COMPANY Of-Ricitwoxo,VinotutA enent i
February 14,1991 o
i LU.S. N'uclear Regulatory Commission Serial No.:
91 057
' Attention: Document Control Desk NL&P/RMN Washington, D.C. 20555 '
Docket Nos.: 50 338 50 339 q
License Nos.: NPF 4 N PF Gentlemen:
VIRGINIA-ELECTRIC' ANu POWER COMPANY 1^
NORTH ANNA' POWER STATION UNITS 1 AND 2
= PROPOSED-TECHNICAL SPECIFICATION CHANGES AUXILIARY FEEDWATER PUMP TESTING Pursuant 10:10 CFRl 50.90, the Virginla= Electric and Power Company requests Lamen.dments, in the form?of changes to the Technical Specifications, to Operating
' License Numbers NPF-4 and NPF-7 for North Anna Power Station Units 1 and 2, respectively,'
j 1The' proposed changes to the North Anna Units 1 and 2 Technical Specifice,tions will allow improvements to.the monthly auxiliary feedwater pump tests. These changes-are !ntended to replace our December 28,1989 request (letter serial nusbar 89-833).
- NRC Bulletin 88-04 " Safety Related Pump Loss" identified uncerns with hydraulic instability in pumps operating near their shut off heads, in our August 8,1988 reply to
- that bulletin we committed to disassembling and inspecting the auxiliary feedwater
. pumps and to mir,!mize operation at low flow. The inspections indicated that some -
idegradation had occurred which was not revealed by the high pressure-low flow testing. The pumps have since been overhauled and our. quarterly ASME Section XI 4
' testing procedures have been revised to allow full flow tests.. A new full flow recirculation line was added during the latest Unit 2 refueling outage and is being installed during the current Unit 1 outage to permit full flow testing e' power without affecting the steam' generators or normal feedwater regulation. Ou, quarterly Section 4
Xl testing is now done at flow conditions near the pump's best efficiency point. This lost p,ovides early warning of degradation and is similar to conditions when the pump Lis perfc rming its safety function. If the monthly test could be done under similar p
p conditions, safety we. Id be enhanced because there would be less pump wear and more effective testing.
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'9102210237 910214
. DR ADoCK 0500 8
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This does not affect our MERITS submittal, tharefore a MERITS change is not attached.
LThe proposed; changes are provided in Attachments 1 and 2.
A discussion of the
. L proposed changes:with the technical justification and safety evaluation of the
. proposed changes is provided in Attachment 3.-
Th!s requestihas been.' reviewed by the Station Nuclear Safety and Operating
-Committee;and the Management Safety Review Committee. It has been determined that this request does not involve an unreviewed safety question as defined in 10 CFR
" 50.59 o_r a significant hazards consideration as defined in 10 CFR 50.92. The basis for jour determinglon that no significant hazards consideration is involved is presented in
' Attachment 4.
Because of the need.to revise procedures, please allow us 60 days to implement
- these changes from the' dates of issuance. Should you have any questions or require l
' additional information, please contact us at your earliest convenience.
> Very truly ud2;rs,
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W.' L. Ste rt. 7 Senior Vich President - Nuclear l
? Attachments
- 1.. Proposed Technical Specification Change for North Anna Unit 1 4
i2.
Proposed Technical Specification Change for. North Anna Unit 2 3.
Discussion of Proposed Changes:
rt 14.110 CFR 50.92 Evaluation cc:'
LU.S.~ Nuclear _ Regulatory Corrmiss on
- Region il s
- 101 Madetta Street, N.W. :
Suite 2900-LAtlanta, GA-30323 Mr. M. S. Lesser
-NRC Senior. Resident inspector 1 North Anna Power Stdion 3
Commissioner.
-Department of Health Room 400 j
109 Governor Street Richmond, Virginia.23219
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COMMONWEALTH OF VIRGINIA )
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. COUNTYOFHENRICO
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, Ths. foregoing.. document was -.. acknowledged _ before me, in -and. for the-County and; Commonwealth aforesaid, today by. E. W. Harrell, who is Vice President - 1 Nuclear -- Operations, for W. L. Stewart, who is Senior Vice' c
. President.- Nuclear, of xVirginia Electric and Power Company.
He is duly j
authorized, to executeLand file the foregoing document in behalf of that c
Company,'.andLthe. statements in the document are true to the best of his k.nowledge and belief.
' Acknowledged : before me' this../
day of t. //IAaat
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