ML19220C388
| ML19220C388 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 03/01/1977 |
| From: | Rosa F Office of Nuclear Reactor Regulation |
| To: | Vassallo D Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7905010061 | |
| Download: ML19220C388 (3) | |
Text
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DISTRIBUTION:
DOCKET FILE (1}
, 377 NRR READING MS PSB READING F. Ahse - Reading File tie'10PA.' DUM FOR: Comenic B. Vassallo, Assistant Director for Light Water Reactors, DPM FROM:
Faust Rosa, Chief Power Systems Branch
SUBJECT:
ADDITICVL IRE 0RMATION RECijEST ITEMS Plant ?iame: Three Mile Island Unit flu:".ber 2 Decket No:
50-320 Licensing Stage: Operating License tiilestone ;io: N/A Responsible Branch: UiR-4 and Project Manager:
H. Silver Requested Completion Date: N/A Review Status: Awaiting Infomation The enclosed additional infomation request itms were creparad by the Power System Branch for trans:nittal to the applicant. Responses to these items a : deemed necessary to complete our review for the Three Mile Island Unit Number 2 Station.
Faust Rosa, Chief Power Systems Branch Division of Systems Safetv
Enclosure:
As stated cc:
S. Hanauer, TA R. Heineman, DSS R. Boyd, DP'l R. Tedesco, PS S. Varga, DPM H. Silver, DPM F. Rosa, PS3 W Mcdonald. MIPC J. r21ynn F. Ahse
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ENCLOSURE ADDITIONAL INFORMATION REQUEST ITEMS FOR THREE MILE ISLAND UNIT #2 222.43 In the Three Mile Island Unit Number 2 electrical design, the Safety Features Actuation System (SFAS) output relays cowered from the same 120 volt a-c vital power supplies, provide input to actua-tion logic for both Engineered Safety Features Systs - trains.
Therefore, it is the staff's position that thest SFAS output relays be qualified as electrical isciation devices.
In this regard, provide the results of the qualification tests for these SFAS output relays and also include in the response the test plan, test set-up, test 7cedures and acceptability requirements.
222.d4 In regard to Balance of Plant (BOP) equipment qualification for out of containment applications. you have provided information which describes your qualification program for equipment by testing in con-fomance with industry standards. Testing in confomance with industry standards may be an acceotable basis for qualifyina BOP equipment, however, industry standards fail to provide adequate docuren-tation to assure in the staff's opinion that equipment will remain operable over the full-range of environments to which equipment may be excosed. Therefore, we require one of the following:
93-232
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Justification that industry standard tests, performed at some undefined nominal environment, gives reasonable assurance that equipment will operate and perfom its function over the full range of environments to which the equipment may be exposed and expected te operate.
2.
Additional testing, in accordance with industry standards to demonstrate operability of equipment over the full-range of environment to which the equirnent may be exposed and expected to operate.
3.
Environmental control system which meets IEEE Std 279-1971 requirements _with an analysis to show that the environment at the equipment location is maintained at the environmental con-ditions at which actual tests were performed.
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The staff requires that the applicant pe:fom a review of all applicable Class lE BOP equipment located outside containment to be perfomed to detemine that each piece of equipment satisfies one of the above requirements. The results of this review should be
.provided to the staff.
Identtftcatten of each modification to the present design, which may be required, should be included with des-cription and criteria. Also include identification and justification of each piece of equipment that does not satisfy any of the above requirements. The details of the review shall be maintained by the applicant for future audit.93-233