ML20234E137

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Amend 6 to Application,Further Detailing Earthquake Design Criteria for All Critical Structures,Equipment & Sys of Proposed Facility
ML20234E137
Person / Time
Site: 05000000, Bodega Bay
Issue date: 03/16/1964
From: Crane P, Sibley S
PACIFIC GAS & ELECTRIC CO.
To:
Shared Package
ML20234A767 List: ... further results
References
FOIA-85-665 NUDOCS 8709220293
Download: ML20234E137 (4)
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Amendment No.'6

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Now comes PACIFIC GAS AND ELECTRIC COMPANY (the Company) and amends its above-numbered application by submitting herewith Amendment No. 6. This amendment eets'forth further details with regard to the earthquake design criteria for Unit No.1 of the Company's Bodega Bay. Atomic Park and supersedes Amendment No. 4 to the application and the material superseded in said amendment.

  • The Company has established earthquake design criteria 8

j for the Unit based upon the recommendations of Dr. George W. i i

Housner.

In general, the usual methods of earthquake resistant design will be followed except that the lateral force factor i

which will be assumed as a basis for designing each critical l

structure, item of equipment or system will vary with the natural i

period and damping characteristics of the particular structure, item of equipment, or system and its support.

The earthquake design criteria for all critical

.- structures, equipmeht and systems are based on the maximum-1 1

credibleearthquakesfounkmotiononthegraniteatBode' gahead.

The design of critical structures, equipment and systems will be based on the curves set forth in the attached design spectrum prepared by Dr. George W. Housner, dated September 6,- 1963. The 8709220293 851217 PDR FDIA FIRESTOB5-665 PDR

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c curves amplify the information given in Appendix V of the Pre-liminary Hazards Summary Report (PHSR) by expanding the low period range (below 0.3 seconds) and by depicting response for additional low values of critical damping. Stress levels'to be used in design will conform, where applicable, to the ASME Boiler and Pressure Vessel Code,Section VIII, including applicable nuclear code cases, the ASA Code for Pressure Piping, and the Uniform Building Code of the International Conference of Build-ing Officials,1961 Edition (except that the usual one-third allowable over-stress for structures during earthquakes will not be applied).

The above design will be based on the following typical damping factors:

Structure, Equipment, System  % of Critical Damping Steel frame structures 2.5 Reinforced concrete frame structures 14 . 5 Reinforced concrete reactor contain- 10 ment structure Welded assemblies 1.0 )

Bolted assemblies 2.0 Vital piping systems 0.5 h In addition, the design of the Unit will be checked to assure that all critical structures, equipment and systems

f. will be capable of wAths'tanding earthquake ground motions cor-(

l- responding to spectrum displacement, velocity and accelerations two times as great as shown on the attached design spectrum with-out impairment of functions necessary for containment and safe plant shutdown.

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Critical structures (referred to as Class 1 Structures in Appendix V to the PHSR) include the reactor containment 4 structure, reactor refueling building, control building, and ventilation stack Critical equipment and systems include the nuclear steam supply system inside containment, isolation valves, I

liquid poison system, emergency cooling systems, emergency

! electrical power system, and the necessary associated instruments-

, tion and controls.

All noncritical structures, equipment, and systems will be designed in accordance with applicable Company aseismic design practices.

Subscribed in San Francisco, California, this 16th

} day of March, 1964 Respectfully submitted, PACIFIC GAS AND ELECTRIC COMPANY s

By_ W ( W, jJe f -A .~L.~Sibley Vice President an67 /

General Manager RICHARD H. PETERSON )

PHILIP A. CRANE, JR.

Attorneys for Pacific Gas lectric C mpan B$ .

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.ip/A. Crane,' Jr.

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Subscribed and sworn to before me this 16th day of March,1964, a i ,l ,,,

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Rita J.~ Oreen, _ . w =_ (SEAL)! i : i ', '

otary Public;in ,8 ' ' ' ,; '

and for the C and County;of ." I '

San Francisco, State of California -

My Commission Expires July 16, 1967.

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