ML19296C654
| ML19296C654 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 02/11/1980 |
| From: | Parr O Office of Nuclear Reactor Regulation |
| To: | Peoples D COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8002270127 | |
| Download: ML19296C654 (3) | |
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Docket flos. 50-373 FEB 111980 and 50-374 Mr. D. Louis Peoples Director of Nuclear Licensing Commonwealth Edison Company P. O. Box 767 Chicago, Illinois 60690
Dear Mr. Peoples:
SUBJECT:
REVISIO!! 0F REQUEST FOR ADDITIONAL INFORMATI0fl FOR THE REVIEW OF THE LA SALLE COUNTY STATION, UNITS 1 & 2, FINAL SAFETY ANALYSIS REPORT (FSAR)
In our letter of January 14, 1980, we transmitted a staff position concerning your operating license application for la Salle County Station, Units 1 & 2, specifically regarding full-load testing of transformers providing power to vital buses. This is to inform you that this position has been revised to reflect the testing requirements of the Power Systems Branch position on degraded grid voltage, which has been applied to all plants in licensing review since 1976.
Our revised position is enclosed.
Please revise our Question 423.42 with this position.
The test description in Chapter 14 of your FSAR should be revised to reflect this position (enclosure) instead of the position previously transmitted.
Please contact us if you desire any discussion or clarification of this request.
Sincerely, b. fm 0 an D. Parr, Chief Light Water Reactors 3 ranch No. 3 Division of Project Management
Enclosure:
As stated cc w/ enclosure:
See next page 2 w o 123 Q
cc: Mr. D. Louis Peoples FE811 IS80 cc: Richard E. Powell, Esq.
Isham, Lincoln & Beale One First National Plaza 2400 Chicago, Illinois 60670 Dean Hansell, Esq.
Assistant Attorney Genera' State of Illinois 188 West Randolph Street Suite 2315 Chicago, Illinois 60601 Pr. Roger Walker, Resident Inspector U. S. Nuclear Ragulatory Commission P. O. Box 737 Streator, Illinois 61364
EflCLOSURE REQUEST FOR ADDITI0t1AL IrtFORMATION LA SALLE COUNTY STATION, UNITS 1 & 2 DOCKET NOS. 50-373 AND 50-374
.i STAFF POSITION (Revised) 420.0 QUALITY ASSURANCE BRANCH 423.42 It has come to our attention that some applicants did not intend to conduct confirmatory tests of some distribution systems and transformers supplying power to vital buses as required by Position 3 of Regulatory Guide 1.68, and more specifically by Part 4 of the staff position on degraded grid voltage (applied to all plants in licensing review by the Power Systems Branch since 1976).
Part 4 of the degraded grid voltage position states ds follows :
"4 The voltage levels at the safety-related buses should be optimized for the full load and minimum load conditions that are expected throughout the anticipated range of voltage variations of the offsite power source by appropriate adjustment of the voltage tap settings of the intervening transformers. We require that the adequacy of the design in this regard be verified by actual measurement and by correlation of measured values with analysis results.
Provide a description of the method for making this verification; before initial reactor power operation, provide the documentation required to establish that this verification has been accomplished."
Your test description in FSAR Chapter 14 does not contain sufficient detail for u, to determine if you intend to conduct such a test.
It is our position that confirmatory tests of all vital buses must be ccnducted 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 and the above cited position.