ML18081B022
| ML18081B022 | |
| Person / Time | |
|---|---|
| Site: | Salem, North Anna, LaSalle  |
| Issue date: | 01/10/1980 |
| From: | Haass W Office of Nuclear Reactor Regulation |
| To: | Parr O Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8002080260 | |
| Download: ML18081B022 (3) | |
Text
Docket Nos. :
JAN 1 O 1980 50-311/.
50-373 50-339 MEMORANDUM FOR:
Olan D. Parr, Chfef9 Light Water Reactors Branch No. 3 Division of Project Management
- FROM:
Halter P. Haass, Chief, Quality Assurance Branch Division of Project Management
SUBJECT:
STAFF POSITION:
SALEM NUCLEAR GENERATING STATION UNIT NO. 2, LASALLE COUNTY STATION UNIT NOS. 1 & 2, NORTH ANNA POWER STATION UNIT NO. 2, INITIAL TEST PROGRAM It was recently brought to our attention by IE that some applicants do not intend to perform 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 transfonners were not properly sized, a loss of voltage or a degraded voltage condition on the vital buses during an accident could result. These applicants had conmitted 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.
However, 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 transformers.
The 'Subject facilities are committed to Regulatory Guide l.68! but have not stated explicitly in their test abs,tracts that this testing will be conducted.
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 CQ'RV of this memo we are also forwarding the enclosure to the DSS branches who have secondary review responsibility for Section 14;2.
Any comments or recommendations from the assigned reviewers in those branches should be addressed to B. Clayton of the QAB.
OFFICE~,....................................
SURNAME~....................................
DATE~....................................
NRC FORM 318 (9*76) NRCM 0240
- u.s. GOVERNMENT PRINTING OFFICE: 1979-289-369
Olan JAN 1 0 1980 Note also that as a/result of the TMI-2 accident additional staff positions or requests for additional infonnation may evolve. It is our intent to forward these as soon as they become available.
Enclosure:
Staff Position cc: S. Bryan, IE_
J. Higgins, RI F. Rosa, DSS T. Speis, DSS K. Kniel, DSS Z. Rosztoczy, OSS R. Satterfield, DSS A. Dromerick, DPM T. Bourni a, DPM Original signed f;>y Walter P. Haass Walter P. Haass, Chief Quality Assurance Branch Division of Pt,oject Management DI,S:rRIBUTION: _
V"Docket.Fi le (3)
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Staff Position It has come to our attention that although some applicants had committed to Regulatory Guide 1.68 1 they did not intend to conduct fulJ-load tests of some 4160-480 volt transformers s~pplying power to vital buses. Your test description in FSAR Chapter 14 does not contain sufficient. detail for us to detennine 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.
Modify your test description to indicate that this testing will be conducted in accordance with Regulatory Guide 1.68.