ML17296B306

Requests NRC Guidance Re Acceptability of Emergency Operations Facility Design.Facility Will Be Basement Level of Administration Annex Bldg.General Design Criterion 19 Will Not Be Exceeded During Accident

ML17296B306
Person / Time
Site:	Palo Verde
Issue date:	03/19/1981
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Miraglia F NRC
References
ANPP-17579-JMA, NUDOCS 8103300309
Download: ML17296B306 (6)

Text

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EGULATOP INFORMATION DISTRIBUTIO 3300309 DOC ~ DATE: 81/03/19 NO Palo Verde Nuclear Station< Unit Palo Verde Nuclear Stations Unit Palo Verde Nuclear Stations Unit Palo Verde Nuclear Stat)one Un)t Palo Verde Nuclear Stations Unit AUTHOR AFFILIATION At izona Public Service Co ~

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SUBJECT:

Requests NRC quidance re acceptability of emergency operations facility design, Facility will be basement, level=

of administration annex bldg. General, Design Criterion 19 will not be exceeded during accidents DISTRIBUTION CODE:

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'HOENIX'RIZONA85036 March 19, 1981 ANPP-17579 - JMA/WFO Mr. F. Miraglia U.S. Nuclear Regulatory Comission Washington, D.C.

20555

Subject:

'alo Verde Nuclear Generating Station Emergency Operations Facility Design File:

81-'056-'026

'D:4.'02.1

Dear Mr. Miraglia:

In the process of finalizing the design of the PVNGS Emergency Operations Facility (EOF),

we have been aware of the changing preliminary EOF siting criteria based on distance from the site.

The Emergency Operations Facility for Palo Verde Nuclear Generating Station has been designed as an underground structure.

The EOF will be the basement level of the Administration Annex Building (AA).

The EOF is 'designed and will be constructed using non-combustible UBC guide-lines.

The exterior walls will be one foot thick, 4,000 psi concrete and extend 15 feet below the ground surface.

The roof of the EOF (first floor of the AA) will be approximately 2 feet thick, 4,000 psi concrete.

The design dose rate for personnel within the EOF is such that the guidelines of GDC 19 will'not be exceeded during the course of the accident.

Radiation protection will be provided by HEPA and charcoal filters in the HVAC system and shielding from the concrete roof.

The required protection factor of 5 will be exceeded by many orders of magnitude.

Factors ranging from 350 to greater than 2000 have been calculated by several different methods and data f

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Since this type of upgraded design has not been discussed in any documents available to us, we request NRC guidance that such a design is acceptable and that such a design does not therefore, require a backup facility.

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Mr. F. Miraglia March 19, 1981 ANPP-17579 - JMA/WFg Page 2

Your attention to this matter is appreciated.

Should you require more information, please do not hesitate to contact us.

Very truly ours Cu.~

E.

E.

Van Brunt, Jr.

APS Vice President, Nuclear Projects ANPP Project Director EEVBJr/WFQ/av cc:

J. Kerrigan

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