ML18149A208
| ML18149A208 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 07/02/1986 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, Rubenstein L Office of Nuclear Reactor Regulation |
| References | |
| RTR-REGGD-01.097, RTR-REGGD-1.097 86-191A, NUDOCS 8607100214 | |
| Download: ML18149A208 (2) | |
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VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 W. L. STEWART VICE PRESIDENT NucLEAB OPERATIONS July 2, 1986 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation Attn:
Mr. Lester S. Rubenstein, Director PWR Project Directorate No. 2 Division of PWR Licensing-A U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT NOS. 1 AND 2 Serial No.
86-191A E&C/WAS/vlh Docket Nos.
50-280 50-281 License Nos. DPR-32 DPR-37 REGULATORY GUIDE 1.97 - SUPPLEMENTAL INFORMATION ON CORE EXIT THERMOCOUPLES COMPLETION SCHEDULE In our letter of April 21, 1986, Serial No.86-191, we identified two variables for which we had committed to modify instrumentation to comply with Regulatory Guide 1.97 but could not fully complete installation by the end of the present Unit 1 refueling outage..
One of these items involves the Core Exit Thermocouple (GET) system for which additional schedular information is provided below.
In our previous letter, we specifically requested a schedule extension to install the upgraded GET system in both units by the end of the upcoming Unit 2 refueling outage.
For Unit 1, we stated our intention to install that portion of the GET system which is inside containment (i.e.
the upgraded core exit thermocouples and associated cables) during the present Unit 1 outage.
Included in this activity, although not specifically stated in our letter, was the installation of associated containment electrical penetrations.
Accordingly, we have installed upgraded thermocouples, associated cable, a1-d electrical penetrations during the present Unit 1 outage.
- However, we have been notified by our vendor, Westinghouse, that certain anomalies have been observed during environmental qualification type testing of the electrical penetrations.
Therefore, the recently installed electrical penetrations in Unit 1, which are unique to our plants, cannot*be declared environmentally qualified.
Containment integrity provided by the penetration is not in question.
At issue is electrical continuity of the penetration at sustained elevated temperatures.
Additional tests, inspections and engineering evaluation will be performed to*establish qualification of these penetrations.
In addition, a modified penetration design is being developed and will be concurrently tested as a contingency. It remains our intention to qualify the existing 8607100214 860702 PDR ADOCK 05000280 P
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e VIRGINIA ELECTRIC AND POWER COMPANY TO Mr. Harold R. Denton penetration design and complete installation of the CET system by the end of the Unit 2 refueling outage.
If, however, the activities currently under way fail to qualify the existing electrical penetrations, they will be replaced with fully qualified penetrations of a modified design.
Should there be any change in the projected completion status identified in this submittal or in the qualification status of the existing or modified electrical penetration design, we will notify you of such change.
If you have any questions concerning this matter, please contact us.
Very truly yours,
~.+/-rcw~~~
cc:
Dr. J. Nelson Grace Regional Administrator NRC Region II NRC Senior Resident Inspector Surry Power Station Mr. Chandu P. Patel NRC Surry Project Manager PWR Project Directorate No. 2 Division of PWR Licensing-A