ML20012C009

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Forwards Topical Rept WCAP-12497, Analysis of Capsule U from VEPCO North Anna Unit 2 Reactor Vessel Radiation Surveillance Program
ML20012C009
Person / Time
Site: North Anna Dominion icon.png
Issue date: 03/08/1990
From: Stewart W
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20012C010 List:
References
90-097, 90-97, NUDOCS 9003190322
Download: ML20012C009 (2)


Text

3 9;

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 March 8, 1990 l

l United States Nuclear Regulatory Commission Serial No.90-097 Attention: Document Control Desk NES/JRH:cdk Washington, D.C.

20555 Docket No.

50-339 License No. NPF-7 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNIT 2 hEACTOR VESSEL MATERIALS SURVEILLANCE PROGRAM In accordance with the requirements of 10 CFR 50, Appendix H.Section III, we-are submitting the attached report (WCAP-12497 issued January, 1990) which l

presents the examination results of the second surveillance capsule removed from North Anna Unit 2.

This report summarizes the post irradiation materials testing and the dosimetry calculations obtained from Capsule U.

1 The reactor vessel surveillance capsule withdrawal schedule contained in the attached report supersedes the schedule contained in the Reactor Vessel Materials Surveillance Program report (BAW-1911, Rev.1) transmitted in our l

letter dated March 13, 1987, Serial Number 85-7228 and will be incorporated in l

a future revision to the Updated Final Safety Analysis Report (UFSAR).

i In accordance with the requirements of 10 CFR 50, Appendix H, we will submit the Technical Specification changes resulting from this capsule analysis by

[

March 15, 1991.

The current North Anna Unit 2 Technical Specifications for i

heatup and cooldown curves and low temperature overpressure protection setpoints are valid to 10 effective full power years (EFPY).

It is expected that the Unit 2 reactor will reach 10 EFPY toward the end of 1993.

However.

l since the measured fluence accumulation was less than that assumed in the extrapolation of the current heatup and cooldown curves and the low temperature overpressure protection setpoints, the current Technical Specifications remain conservative until the Technical Specifications are reviewed for desired changes based on the Capsule U evaluotion.

Very truly yours, n

k/

JAdv W. L. Stewart Senior Vice President - Nuclear Attachment g0 i

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9003190322 900308 PDR ADOCK 05000339 P

PDC

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l Serial No.-90-097; NAPS cc:

U. S. Nuclear-Regulatory Commission Region 11 101 Marietta Street, N. W.

Suite 2900-Atlanta, Georgia = 30323 Mr. ' J. L. Caldwell NRC Senior Resident Inspector North Anna Power Station