ML20196A719
| ML20196A719 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 11/30/1988 |
| From: | Cartwright W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| RTR-REGGD-01.099, RTR-REGGD-1.099 88-492A, GL-88-11, NUDOCS 8812060085 | |
| Download: ML20196A719 (2) | |
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1-VinoINIA Er.scTunc Axo Powan Coxiwxy Ricnwoxo,VamorxrA sonst l
November 30, 1988 l
vu. e.....n I
l
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U. S. Nuclear Regulatory Commission Serial No.
88-492A i
Attn: Document Control Desk PES /DMB:cdk 7
Washington, D.C.
20555 Docket Nos.
50-338 i
50-339 l
l License Nos. NPF-4 i
NPF-7 i
l Gentlemen:
VIRGINIA ELECTRIC AND POWI.R COMPANY R575R5TTDMRIC LtTITA 88-11 Ii5RTIFARl[PDWW3TATIOK UNIT 5 T AND 2 l
l Generic Letter 88-11 requires a submittal to provide details of che Guide 1.99, Revision 2 in analyses, other than implementation of Regulatory (PTS), that require an estimate of the embrittlement pressurized thermal shock l
l of reactor vessel beltline materials.
Technical analyses necessary to l
I detemine the impact of Revision 2 are to be sumarized and a proposed schedule i
i for implementation of necessary actions is required. The generic letter states
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that all required actions should be completed within 2 plant outages l
(approximately 3 years).
Virginia Electric and Power Company is implementing the methodology of
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Regulator; Guide 1.99, Revision 2 into the heatup and cooldown curves for North Anna. Unit 1.
An amendment request containing the proposed Technical
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Specification changes resulting from the latest surveillance capsule analysis i
will be submitted by November 30, 1988. The proposed changes result in less restrictive Technical Specifications (i.e.heatupcurve,cooldowncurvesand LTOP setpoints) for North Anna Unit 1.
The Revision 2 methodology will be incorporated in the North Anna Unit 2 Technical Specifications following the analysis of a surveillance capsule which is scheduled to te removed during the i
next refueling outage.
I It is clear that operation will become increasingly more restrictive beyond the proposed validity date of 10 EFPY unless some form of relief can be identified.
in order to obtain this required relief, Virginia Electric and Power Company is First, the com in the l
Power Research Institute (EPRI)pany is an active participant pursuing several options.
radiation embrittlerent program which Electric represents an industry effort to solve several issues resulting from increased
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embrittlerent including the decreasing operating window on the heatup and cooldown curves. Additionally, the company is in the process of joining the B&WOG materials committee.
Membership in this group is appropriate because i
some of the welds in the Surry vessels were made by B&W.
It is expected that i
some of the benefits will apply to North Anna. These two efforts are the j
programatic means being used te identify relief and thereby provide additional margin in operating window. Since these efforts are just beginning it is too early to predict how ruth relief can be obtained.
l 8912060085 S31130 l
7 hDR ADOCK 050003;33 t
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In sumary, proposed Technical Specifications which implement Regulatory Guide 1.99, Revision 2 in the appropriate Technical Specifications are currently being prepared for North Anna Unit 1.
The North Anna, Unit 2 implementation will be made during the analysis of the next surveillance capsule.
These changes will include revised LTOP setpoints.
At this point no other activities are scheduled.
The programmatic options are being pursued to provide relief for operation after 10 EFPY.
Very truly yours.
V Mtb W. R. Cartwright Vice President - Nuclear Attachments cc:
U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W.
Suite 2900 Atlanta, Georgia 30323 Mr. J. L. Caldwell NRC Senior Resident Inspector North Anna Power Station