ML20148F085
| ML20148F085 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 12/23/1977 |
| From: | Stello V Office of Nuclear Reactor Regulation |
| To: | Groce R YANKEE ATOMIC ELECTRIC CO. |
| References | |
| TASK-03-12, TASK-3-12, TASK-RR NUDOCS 8011030759 | |
| Download: ML20148F085 (4) | |
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-Doctet No. 50-29 DEC 2 31977
_ f:p Yankee Atomic Electric Co:npany
[i ATTN: Mr. Robert H. Groce j.j Licensing Engineer L-20 Turnpike Road
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\\!cstboro, Massachusetts 01581
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Gentlenen:
RE: YANKEE-ROWE ATOMIC P0tlER STATION T.
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Our letter of December 1,197/, discussed your participation in the Systenatic Evaluation Program (SEP) for operating reactors and provided a report describing the program. The program includes the topic
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" Environmental Qualification of Safety-Related Equipment" as one of the topics of safety significance. The program further provides that topics considered to be of special safety significance would continue to be evaluated on a case-by-case basis in advance of conpleting the overall i
program. The staff has determined that it is appropriato to conalete b;
its review of this subject as the first topic of the SEP.
F The enclosed " Staff Report on the Environmental cualification of Safety-Pelated Electrical Equipment" (NUREG 413) supports the staff position that no imediate action for your facility is required, but that it is appropriate to initiate the review of this topic.
This docueent was prepared as part of the NP.C staff's response of December 15, 1977 to a Union of Concerned Scientists petition dated Hovember 4,1977. The report also provides the staff review procedure, a discussion of the historical evolution of regulatory criteria, current generic staff effort, a sumary of relevant operating exnertence and other infornation relevant to this topic.
Therefore, pursuant to 50.54(f), please deliver to the Office of Huclear Reactor Regulation, Hocicar Regulatory Comission within 60 days from the date of this letter three signed orioinals and 40 copies of the following infornation:
THIS DOCUMENT CONTAINS
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1.
Identification of safety-related electrical equipmeint located both,,
@l inside and outside containment which are required to perform a safety F
function under the environmental condition resulting from each Design E B Basis Event (DBE) for your facility. The OBE is defined as any E
3 single event which could potentially result in greater than routine release of radioactivity from the site. Briefly describe the safety function provided by each item of the equipment identified. Describe the location of the equipment.
Identify any non-safety system, 9
equipment or components, which, if subjected to the environmental
.. l conditions associated with a DBE, could affect the safety function
. 4 of any safety-related system.
Identify non-safety systems which
.c could perforu, the function of a safety system by ameliorating the consequences of a DBE and specify electrical equipment required to assure function of such non-safety systems.
2.
Definition of the limiting service environmental conditions for operating of the, equipment and components identified above. The environmental paraneters should include pressure, temperature, humidity, submergence, steam, radiation, chemicals, vibration
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or any combination of the above (seismic conditions' are not to be included but will be considered elsewhere in the SEP). These
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environnental conditions should be presented as a function of tine and the DBE producing the conditions should be identified. The tine period during which each item of equipment would be required i
to opeiate in a DBE environment should also be identified.
7 3.
Deternination of the current status of environmental qualification for safety-related electrical equipment and identification of the supporting documentation. Any evidence by tests and aralyses of environnental qualification for any environmental condition should be considered and provided.
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t.ny infonaation previously provided to the HPC that is still appropriate N.
nay be provided by reference.
tie will be contacting you shortly to arrange a meeting to provide you with additional background information.
In addition, a visit of your q
facility will be scheduled in the near future to obtain information on q'
safety-related electrical equipnent through direct onsite observation of these systens.
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Yankee Atomic Electric Company 23 $77 E:
Our safety assessment of this review topic will consider:
(1) ability p:
of the facility to adequately respond to all design basis events.
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(2) importance of the safety function and alternate ways of performing the safety function such as the possible use of non-safety system, (3) all available testing and qualification data, (4) any existing protection of the equipment from the environment, or (5) any other basis for acceptability Ph that you might identify.
liy Sincerely, oriMnai signedli%l
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wor steno Victor Stello, Jr., Director Division of Operating Reactors F
Office of Nuclear Reactor Regulation
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Yankee Atomic Electric Company
- December 23, 1977 cc w/ enclosure:
Mr. Donald G. Allen, President Yankee Atomic Electric Company
'20 Turnpike Road y
Westboro, Massachusetts 01581 Greenfield Public Library 402 Main Street Greenfield, Massachusetts 01581 f>>
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