ML19308C726
| ML19308C726 | |
| Person / Time | |
|---|---|
| Site: | Shoreham, Sequoyah File:Long Island Lighting Company icon.png |
| Issue date: | 01/11/1980 |
| From: | Haass W Office of Nuclear Reactor Regulation |
| To: | Rubenstein L Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8002010205 | |
| Download: ML19308C726 (3) | |
Text
JAT 11 1980 Docket flos.: 50-327 50-322 -
MC10RAriDUM FOR:
Lester S. Rubenstein Acting Chief, Light Water Reactors Branch tio. 4. Division of Project Management FROM:
Walter P. Haass, Chief, Quality Assurance Branch, Division of Project Management
SUBJECT:
STAFF POSITI0ft: SEQUOYAll fiUCLEAR PLArtT UtlIT tiOS.1 & 2 APID S110 relia!! fiUCLEAR POWER STATI0tl UtilT fl0.1, IfilTIAL TEST PROGRAM It was recently brought to our attention by IE that some applicants do not intend to perfom full-load tests of vital 480 volt AC buses using all sources of power supplies to the buses. As a result, some 4160-480 volt transformers would not be full-load tested. Our concern is that if the transfomers were not properly sized, a loss of soltage or a degraded voltage condition on the vital buses during an accident could result. These applicants had cornitted in their FSAR to Regulatory Guide 1.68 and did not take exception to the part which states that load testing of vital buses and their power supplies should be conducted. liowever, their test descriptions (in FSAR Chapter 14) did not state explicitly that this testing would be conducted, and they maintained that their test programs had been approved without full-load tests of these trans formers.
Both Shoreham and Sequoyah are connitted to Regulatory Guide 1.68, but neither has stated explicitly in their test abstracts that this testing will be con-ducted.
It is our position that full-load tests of the vital buses must be conducted including all power supplies. We request that you forward the enclosed staff position to these applicants.
By copy of this memo we are also forwarding the enclosure to the DSS branches who have secondary review responsibility for Section 14.2. Any coments or recomendations from the assigned reviewers in those branches should be addressed to B. Clayton of the QAB.
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2-Lester S. Rubenstein Note also that as a result of the Tl!I-2 accident, additional staff positions or requests for additional infonaation may evolve. It is our intent to forward these as soon as they become available.
- tig r.al signed by Walter P. Haass Walter P. Haass. Chief Quality Assurance Branch Division of Project Management
Enclosure:
DISTRIBUTION:
Staff Position Docket File (M cc:
S. Bryan, IE QAB Projects J. Higgins. RI QAB Chron. File C. Stahle. DPM NRR Reading File DS kovholt J. Wilson. DPM WHaass F. Rosa, DSS T. Speis, DSS BClayton DBeckham K. Kniel, DSr Z. Ros toczy, DSS FAllenspach R. Satterfield. DSS
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Staff Position It has come to our attention that although some applicants had committed to Regulatory Guide 1.68, they did not intend to conduct full-load tests of some 4160-480 volt transformers supplying power to vital buses. Your test description in FSAR Chapter 14 does not contain sufficient detail for us to determine if you intend to conduct such a test.
It is our position that full-load tests of vital buses must be conducted including all sources of power supplies to the buses.
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Modify your test description to indicate that this testing will be conducted in accordance with Regulatory Guide 1.68.
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