ML20147E365

FOIA Request for Documents Re NRC 750318 Summary of ACRS Subcommittee Meeting on 750218-19

ML20147E365
Person / Time
Site:	Diablo Canyon
Issue date:	02/10/1988
From:	Stewart M PACIFIC GAS & ELECTRIC CO.
To:	NRC
References
FOIA-88-114 NUDOCS 8803070045
Download: ML20147E365 (4)

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PACIFIC OAS AND ELECTR,IC C O M PANY

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. n stAtt statti . S AN FQANCISCO. C ALf rORNI A 941C6 . (41$) 78142;1

• TWX 9lC 372 6'sB7 February 10, 1988 DOf.1 OF INFORMAM ACI REQUEST Director, Office of Administration fMA 45-//Y U.S. Nuclear Regulatory Commission 'd J- /7- P P Washington, D.C. 20555 Re: Freedom of Inforrnation Act Reauest Pursuant to the Freedom of Information Act (5 USC 552 et seq.) and implementing regulation 10 CFR 9 subpart A, we request that you furnish the documents identified in the attached FCIA request.

In accordance with the provisions of 10 CFR 9.14, we are prepared to pay fees necessarily incurred in responding to this request.

If you should have any questions regarding the request, please contact the undersigned at telephone number (415) 768-4917. Your prompt attention to this request will be greatly appreciated.

Very truly yours, Mary Eliza Stewart MES: mat Enclosure

! 8803070045 880210 PDR skkWAR88-114

. i i FOIA REQUEST NRC

1. Item 4 on p. 11 of the March 18, 1975 NRC summary of the ACRS Subcommittee Meeting held on February 18-19, 1975 on Diablo Canyon (see Attachment 1 to this FOIA) lists an ACRS subcommittee question on adequacy of audits. This question was to be answered by the NRC staff.

2. Page 2 of Attachment 2 to this FOIA request is entitled "Enclosure 1" and includes some informal notes on the status of responses to this and other ACRS subcommittee questions. These notes indicate that the response to the question described above was "done."

3. Please provide:

(a) a copy of the entire document that includes Enclosure 1 (Item 2 above); and (b) any documents that provide the response to the ACRS subcommittee question described in Item 1 above.

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IRM ' 'I11ANSCRIPT FIET. DC SlffWOf DESCRIPTION ADDRESSED TO ,f PAGE PAGE

1. 160-161 ,IO Will the turbine valves close aliably Applicant on loss of power during an earthquake.

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-l 2. 162 10 Justify in detail 0. tag in light of Applicant & q apparunt discrepancies. Staff

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10 What would be peak accelerations Applicant C 1

- with other current methods. Staff 4c 162 - 10- What would be the effect on the Applicant & _f plant of a small magnitude carth- gF

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. quake with high accelerations.

- S. 163 - 10 When the peak acceleration lus been Applicant E

..y determined would it be possible Staff to derive a cx>nfidence level for it.

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.' 6. 163 10 What are the maximum observed and Applicant &

predicted intensities at this site Staff

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and the peak accelcrutior. resulting fran these. .

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7.' 164 10 ,

Provide USGS open file report Applicant C 74-272 to ACRS. Staff

~ 8. 165 - If any additional interpretations Applicant E of data exist provide aiv1/or Staff describe to ACRS.

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' Inclosure No. 1 - .

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TRANSCRIPr HELTI!G SLMIARY DESCRIPTION ADDRESSED *It PAGE PAGE -

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10 Consider the possibility that the *

. ,2 newer carthquakes do mom to the Staff .

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structure than the orir.im1 design, ,

. Reservations on using Parkfield i I

. earthquake. .

, 10 165 - H What kind of errors can arise in Applicant E .

\ . saismic design analysir.. Staff .

n . 166 11 . What are the errors going frun 1 Applicant E ( -

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dimensional scismic model to Staff ,,,) M -

finite element analysis.

12. 166 H . Why do the two new spectra prtwide Applicant E

. adequate assumnce. Staff

p. f 13 . 166 11 . How does the staff decide what Staff 4 p g , ,.', '7, constitutes an adequate audit '-

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4 . 169 H Response of instruments and equip- ' Applicant '

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ment to higher accelemtions at -

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173 . higher frequencies.

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153 196 12 Ibll scale shakirt of stmeturus.

Applicant .

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