ML20236C630

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NRC Staff Response to Interrogatories of San Luis Obispo Mothers for Peace.* Certificate of Svc Encl
ML20236C630
Person / Time
Site: Diablo Canyon, 05000000
Issue date: 07/07/1975
From: Tourtellotte J
NRC OFFICE OF THE EXECUTIVE LEGAL DIRECTOR (OELD)
To:
SAN LUIS OBISPO MOTHERS FOR PEACE
Shared Package
ML20236A877 List: ... further results
References
FOIA-87-214 OL, NUDOCS 8707300139
Download: ML20236C630 (7)
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UNITED STATES OF AMERICA (~ ' . .

NUCLEAR REGU8.ATORY COMMISSION

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BEFORE THE ATOMIC SAFETY AND LICENSING BOARD  !. ,

,s In the Matter of )

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PACIFIC GAS AND ELECTRIC COMPANY Docket Nos. .~ l 50-373 0.L. j (Diablo Canyon Nuclear Power Plant, l  ;

Unit Nos. 1 and 2) ) l l

NRC STAFF'S RESPONSE TO INTERR0GATORIES OF SAN LUIS OBISP0 MOTHERS FOR PEACE l l

On June 19, 1975, Intervenor San Luis Obispo Mothers for Peace l propounded 12 interrogatories to the Staff of the Nuclear Regulatory Commission (NRC). The Staff respor.ds now to Interrogatories 2, 5, 7, 8, 9,10,11 and 12. We will respond as soon as possible to Interrogatories 1, 3, 4 and 6.

2. With respect to the ability of the Diablo Fuel Handling Building, and its fuel racks, cranes, manipulators, all piping and water system., as well as the result of its contents, and the Design Class I tanks adjacent to it, to withstand a DD,E, please set forth A. The nature of HRC detailed review and analytical checks, if any, of PG&E calculations.

B. The extent of NRC review of PG&E calculations.

Response .

A. The Staff has reviewed in detail the Preliminary (PSAR) and Final Safety Analysis Reports (FSAR), including the design criteria in Sectiond 3.3.1, 3.3.2, 3.4, 3.5.3, 3.7 and 3.8 of the FSAR. In addition the Staff is reviewing the design criteria in several reports related to high energy line breaks f

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and qualification of equipment which relate to the fuel handling building and equipment. The Staff has performed some detailed audits of PG&E calculations for buildings and equipment at Diablo Canyon with similar design criteria to the fuel handling building. The Staff has not performed a detailed review or analytical checks of PG&E calculations regarding the ability of the fuel handling building, its contents and adjacent tanks to withstand a Design Basis Earthquake.

B. See the response to interrogatory 2A l

5. Identify the first commercial power plant to use 17 x 17 fuel assemblies. If no commercial plant has used a core comprised entirely of 17 x 17 assemblies, what plant will be the first to do so?

Response .

The first commercial power plant to use 17 x 17 fuel assemblies was Surry Unit 1, which used two 17 x 17 assemblies. .io commerc ai l power The plant has used a core comprised entirely of 17 x 17 assemblies.

Ste" rioes not know what plant will be the first to do so because ,

l future variations in construction schedules can affect the outcome.

l However, the Staff expects that one of the following plants will be 1 I

the first to employ a core comprised entirely of 17 x 17 assemblies:

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.. s Beaver Valley Unit 1 Trojan Diablo Canyon Unit 1 Salem Unit 1

7. With respect to the 17 x 17 core design please set forth those areas that have not, as yet, been qualified, by the NRC Staff, as complying with the ECCS final acceptance criteria.

Response

FLECHT Test Data: Extrapolation of 15 x 15 FLECHT test data to 17 x 17 has been approved on an interim basis based.on preliminary data provided j I

by Westinghouse to justify the extrapolation. Final approval is pending formal submittal and evaluation of test results on the 17 x 17 fuel rods.

8. If the definitive location of the 1927 magnitude 7.3 earth-quake ultimately becomes a value judgement by all concerned, due to lack of definitive data, do you feel obliged to poste16te its location on the Hosgri, in the interests of (

the public health and safety? f l Response In determining the location of the 1927 earthquake the Staff will consider

  • j all of the facts and circumstances available at the time the decision is made. Some of those facts and circumst'ances have not yet been developed.

Some may preclude postulation of the location on the Hosgri fault.

Therefore, the Staff cannot now say whether it will feel obliged to

. s postulate the location on the Hosgri fault. So the answer at this time is no.

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9. If answer to above is no, please set forth basis for j

answer.

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Response

See answer to Interrogatory 8. 1 1

10. In the context of 10 CFR 100, Appendix A, what do you '

l' consider to be the magnitude of the maximum earthquake that could occur on the Hosgri Fault Zone?

Response

On the basis of presencly available information, Richter Magnitude 6.5

11. Reference NRC-Diablo Canyon SER Supplement No. 2 (May 9, i 1975) p. 4-8. Please send us an updated version with details of Table 4.1.

Response

The Staff does not have a version of Table 4.1 which is more recent than that contained in Diablo Canyon SER Supplement No. 2. ,

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12. With respect to generic 17 x 17 fuel assembly evaluation and verification program, please identify first plant l expected to use i 1

A. One or two 17 x 17 assemblies B. A full core of 17 x 17 assemblies Response l 1

I See the answer to interrogatory No. 5. .

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Respectf' .y submitted, j CLcA w Uu L G. 'C(La James R. Tourte110tte Assistant Chief Hearing Counsel Dated at Bethesda, Maryland l this 7th day of July,1975 Oe

UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of PACIFIC GAS AND ELECTRIC COMPANY ) Docket Nos. 50-275 0.L.  !

50-323 0.L. l (Diatilo Canyon Nuclear Power Plant, j Units Nos. I and 2)

CERT.IFICATE OF SERVICE l

I hereby certify that copies of "NRC STAFF'S RESPONSE TO INTERROGATORIES OF SAN LUIS 'JBISP0 MOTHERS FOR PEACE," dated July 7,1975 in the above- I captioned matter, have been served on the following by deposit in the United States mail, first class or air mail, this 7th day of July, 1975:

Elizabeth S. Eowers, Esq. Andrew J. Skaff, Esq.

Atomic Safety and Licensing California Public Utilities Commissiot Board 5246 State Building ,

U. S. Nuclear Regulatory Commission 350 McAllister Street Washington, D. C. 20555 San Francisco, California 94102 Mr. Glenn 0. Bright Raye Fleming Atomic Safety and Licensing 1746 Chorro Street i Board San Luis Obispo, California 93401 U. S. Nuclear Regulatory Commissior.  !

Washington, D. C. 20555 Mr. Frederick Eissler Scenic Shoreline Preservation Dr. William E. Martin Conference, Inc.

Senior Ecologist 4623 More Mesa Drive Battelle Memorial Institute Santa Barbara, California 93105 Columbus, Ohio 43201 Mrs. Sandra A. Silver Philip A. Crane, Jr. , Esq. 1315 Cecelia Court Pacific Gas and Electric Company San Luis Obispo, California 93402 77 Beale Streat San Francisco, California 94105 Mr. Gordon Silver 1315 Cecelia Court Mr. John Forster San Luis Obispo, California 93402 ,

985 Palm Street San Luis Obispo, California 93401

Mr. Williar. P. Cornwell Docketing and Service Section  !

P. O. Box 453 Office of the Secretary of the l Morro Bay, California 93442 Commission U. S. Nuclear Regulatory Commission Atomic Safety and Licensing Washington, D. C. 20555 Appeal Scard U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Atomic Safety and Licensing Board Panel .

U. S. Nuclear Regulatory Commission Washington, D. C. 20555 .

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Yah N. t;..h:  %,

mes R. Tourtellotte 1 Assistant Chief Hearing Counsel l

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