ML20210C626
| ML20210C626 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon, South Texas, 05000000 |
| Issue date: | 10/14/1975 |
| From: | Heineman R Office of Nuclear Reactor Regulation |
| To: | Eicheldinger C WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| Shared Package | |
| ML20210C503 | List:
|
| References | |
| NUDOCS 8705060253 | |
| Download: ML20210C626 (2) | |
Text
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' UNITED STATES NUCt. EAR RECULATERY COMMISSION 0
WASHINoToN, D. C. 20555 OCT141975 p ~ p" W ' m Mr. C. Eiche1dinger, Manager d
Nuclear Safety Department M
OCT 171975 Westinghouse Electric Corporation D
P. O. Box 355 C. ElCHELDINGER f
Pittsburgh, Pennsylvania 15230 PWR NUCLEAR SAfEM Dear Mr. Eicheidingers Your letter to Mr. B. Rusche, dated August 19, 1975, was referred to me for response.
In your letter, you reiterate the agreements reached at a generic meeting with the staff concerning wiring separation within the I & C protection racks.
These agreements were specifically related to your 7100 Series Process Control System.
Further, you request a meeting with the staff to discuss the extension of these agreements to the 7300 Series Process Control System since there exists an impasse with the staff in this regard.
As a result of the generic meeting, it was the staff's understanding that the additional verification testing was to assure that the "as built" 9
installation of the Diablo Canyon 7100 Series Process Control System which (V
did not conform to design criteria wiring separation would be i=mune to
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postulated conditions. The staff also believed that Westinghouse
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understood that this test was only applicable to the Diablo Canyon design and subsequent plants would have to be reviewed individually.
- Further, the statement that the results and conclusions of the tests have been accepted by the staff appears in error. A letter to Pacific Gas and Electric Company from Olan D. Parr of NRR, dated September 4,1975, identified the areas that require resolution. ' A copy of this icteer is attached for your convenience.
We agree with you that this matter should be resolved in an expeditious In this regard, I suggest that the appropriate members of manner.
your staff contact Mr. Thomas A. Ippolito, Chief. Electrical, Instrumentation and Control Systems Branch to establish a mutually agreeable meeting date.
Sincerely,
'j e
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R. Heineman, Director Division of Technical Review I
Office of Nucicar Reactor Regulation
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Attachment:
As Stated
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0705060253 B70430 PDR ADOCK 05000493 A
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November 14, 1975 9 k 3_421 2
Mr. D. V. Kelly S.O. PGE-320 Chief Mechanical Engineer PACIFIC GAS AND ELECTRIC COMPANY Y.2/ ' M 77 Beale Street San Francisco, California 94106 PACIFIC GAS AND ELECTRIC COMPANY
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NUCLEAR PLANT, DIABLO CANYON SITE Amendment to W Pro.tection Systems Noise Test
Dear Mr. Kelly:
Attached are 30 copies of the subject report as agreed during the telecon of October 2,1975 between Pacific Gas and Electric Co., NRC and Westing-
- house, e
The attachment includes (1) an amendment (indicated as Attachmen s
the subject report and (2) background information relative to electrical separation within I and C Protection Racks as installed at Diablo Canyon.
Attachment B is a revision to the original noise tests report (dated Occcmber,1974) as amended in February,1975.
All recipients of the noise tests report should update their copies in accordance with instructions in Attachment B.
This amendment should resolve all NRC concerns on the Nuclear Instr (NIS), the Solid State Protection System (SSPS) and the 7100 Series Process i
Control System (RCS) equipment racks as installed at your site, i
Please advise if you have any further questions.
Very truly yours, WESTINGHOUSE NUCLEAR ENERGY SYSTEMS
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P. Blau Project Engineer l
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APPROVED:
jmh W. C. Gangloff. Hanager Pacific Gas and Electric Project l'
cc:
D. V. Kelly 6L, 30 Encl.
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R. L. Heller,s, IL
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