ML20108B470
| ML20108B470 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 02/28/1985 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, John Miller Office of Nuclear Reactor Regulation |
| References | |
| 479B, NUDOCS 8503070233 | |
| Download: ML20108B470 (2) | |
Text
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\\*icel'rusklent itztOfice[ht26666 Nuckwqwarioru OrwjarrusRnerik:a Ridn.vnd 11rginkt 23261 February 28, 1985 Mr. Harold R. Denton, Director Serial No. 4798 Office of Nuclear Reactor Regulation N0/DAS:acm Attn:
Mr. James R. Miller, Chief Docket Nos. 50-338 Operating Reactors Branch No. 3 50-339 Division of Licensing License Nos. NPF-4 U. S. Nuclear Regulatory Commission NPF-7 Washington, D. C. 20555 Gentlemen:
VIRGINIA POWER NORTH ANNA POWER STATION UNIT NOS. 1 AND 2 REACTOR VESSEL MATERIAL SURVEILLANCE TEST RESULTS In Virginia Power letters, Serial Nos. 479 and 479A, dated August 16, 1984, and November 6, 1984, respectively, we stated that we would submit an amendment request to the NRC by February,1985, based on the evaluation of the first capsule of the reactor vessel surveillance program for both units.
This amendment request would revise the pressure-temperature limits and the operating period for these new limits as well as addressing power-operated relief valve setpoints for low temperature protection. It has been determined that additional effort is needed to complete the evaluation of the data and associated limits and setpoints. Therefore, we request an extension to delay providing this amendment request until April
~30, 1985.
The existing Unit 1 heatup and cooldown curves are based on predicted conditions at the end of five effective full power years (EFPY) of operation.
The curves for Unit 2 are based on eight EFPY. Unit I has operated 4.10 EFPY and Unit 2 has operated 2.88 EFPY. The reactor vessel surveillance program test results are presently under evaluation to determine the impact, if any, on the existing heatup and cooldown curves.
Results of this evaluation will also be included in the April 30, 1985, submittal.
Mr. L. B. Engle of your Staff was apprised of this extension request in a telephone conversation with Mr. D.
A. Sommers en February 25, 1985. If you have any questions or require further information, please contact us.
Very truly yours, t
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%,9h 8503070233 850228 PDR ADOCK 05000338 P
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Dr. J. Nelson Grace i.
. Regional Administrator l
Region II-1l-Mr. M. W. Branch NRC Resident Inspector 4
i North Anna Power Station i
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