ML17298B552

Forwards Clarification to Footnote 7.(h) in FSAR Table 3.2-1 Re Design of Hangers & Supports to Same Classification as Associated Equipment or Piping Required for Safety

ML17298B552
Person / Time
Site:	Palo Verde
Issue date:	11/30/1984
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Knighton G Office of Nuclear Reactor Regulation
References
ANPP-31273-EEVB, NUDOCS 8412040032
Download: ML17298B552 (12)

Text

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REGULATORY NFORMATION DISTRIBUTION S'f ~

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ACCESSION NBR 84120 I0032, DOC ~ DATE ~ 84/1 1/30 NOTARIZED~ 'ES DOCKET FACIL'.STN 50>>528 Palo Ve'rde Nuclear'tations Unit ii Arizona Publi 05000528

'STN,SO 529 Palo Ve'r de Nuclear <<Stationi Unit 2'i Arizona Publ i 05000529 STN 50 530 Palo Verde Nuclear Stations Unit 3i Arizona Publi 05000530 AUTH,NAME"'

AUTHOR'AFFILIATION VAN, BRUNT'iE'.E.

Arizona Public, Service Co

'RECIP ~ NAME RECIPIENT AFFILIATION KNIGHTON'gG ~ l>>t ~

Licensing Branch

'3

SUBJECT:

Forwards clarification to Footnote" 7,(h) in FSAR Table: 3,2 1

redesign of hangers L,supports to same classification as associated equipment>> or >>piping required for safety.

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TITLE-:- Licensing 'Submittal:

PSAR/FSAR Amdts 5, Related Correspondence NOTES:Standardized plant".

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Arizona Public Service Company ANPP-31273-EEVB/WFQ/TJB November 30, 1984 Director of Nuclear Reactor Regulation Mr. George W. Knighton, Chief Licensing Branch No.

3 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2, and 3

Docket Nos.

STN 50-528/529/530 FSAR Table 3.2-1, Footnote 7.(h) Clarification File:

84-056-026'.1.01.10

Dear Mr. Knighton:

Attachment 1 provides a clarification to footnote 7.(h) of the PVNGS FSAR table 3.2-1 required due to a recently discovered previous typographical error.

Attachment 2 provides a discussion regarding this clarification.

Me believe this clarification is technically insignificant since the PVNGS project work was accomplished to the correct criteria.

Very truly yours, E. E.

Van Brunt, Jr.

APS Vice President Nuclear Production ANPP Project Director EEVB/MFQ/mb Attachments cc:

E. A. Licitra A. C. Gehr W. E. Ide R. P.

Zimmerman 8412040032 84ii30 PDR ADDCK 05000528 PDR

ANPP-31273 STATE OF ARIZONA

)

) ss.

COUNTY OF kfARICOPA)

I, Donald B. Karner, represent that I am Assistant Vice President, Nuclear Production of Arizona Public Service

Company, that the foregoing document has been signed by me on behalf of Arizona Public Service Company with full authority to do so,'hat I have read such document and know its

contents, and that to the best of my knowledge and belief, the statements made therein are true.

Donald B. Karner Sworn to before me this 3&%

day of 198'4.

tary Public My Commission Expires:

Qy Comm1ssion Expires ApN 6, >ms

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Table 3.2-1 QUAIITY CLASSIFICATION OF STRUCTURES, SYSTEMS AND COMPONENTS (Sheet 36 of 39)

)S2 7.

Letter in arentheses continued American Welding Society, Welding in Building Construction (AWS D1.1-72), (with 1973 revision, or later edition)

I>2 (g)

(h)

There is no established standard for commercial pumps.

ASHE Section VIII, Division 1, and ANSI B31.1.0 Power Piping represent

related, availabele standards which, while intended for other applications, are used for guidance and recommendations in determining quality group D pump allowable stresses, steel casting quality factors, wall thicknesses, materials compatibility and specifications, te-perature-pressure environment restrictions, fittings, flanges,

gaskets, and bolting, installation procedures; etc.

Hangers and supports are designed to the same classification as the associated equipment or piping when the equipment is required for safety.

KNS8R 7 Additional components that are part of the zeactoz coolant pressure boundary as defined in 10CFR50.2(v.),

but excluded from the requirements fo 10CFR50.55a pursuant to footnote 2 of that section are quality group B and safety class 2 and designed to ASHE Section III Class 2.

(j)

Loss of cooling water and/o seal water service to the reactor coolant pumps may require stopping the pumps.

However, continuous operation of the pumps in not required during or after an SSE.

The auxiliaries are therefore not necessarily Safety Class 2 or Seismic Category I.

(k)

Only those structural portions of the reactor coolant pumps which are necessary to assure the integrity of the reactor coolant pressure boundary are Safety Class 1.

(1)

Two safety classes are used for heat exchangers to distinguish primary and secondary sides when they are different.

(m)

Penetration Sleeve is designed in accordance with BC-TOP-l, Rev.

1.

Penetration Head meets ASHE B&PB Code Section 111 Class 2.

Uniform Building Code, 1973 Edition See section 3.8.1.2.

(b)

American Petroleum Institute, Welded Steel Tanks for Oil Storage (API-650)

American Petroleum Institute.

Recommended Rules for Design and Construction of Large,

Welded, Low-Pressure Storage Tanks (API-620)

(c)

Designed in accordance with BC-TOP-, Rev. 1.

(d)

The pressure boundary housing for this component is a reactor vessel appurtenance and is Safety Class 1

and Seismic Category I.

(e)

. These components and associated supporting structures must be designed to retain structureal integrity during and after a seismic evert but do not have to retain operability for protection of public safety.

The basic requirement is prevention o

structural collapse and damage to equipment and sutuctures required for protection of the public safety.

(f)

Only those core suppor structures necessary to support and restrain the core and to maintain safe shutdown capability are class@fied as Seismic Category I.

t)2 g o M

A M

OQZ Cl H ~

M O

H M

INSERT A Non-safety portions of structures, systems or components whose failure could reduce the functioning of any safety-related structure, system or component are designed and constructed such that an SSE would not cause such failure.

The following information discusses the history leading to the clarification to footnote 7.(h) of the PVNGS FSAR Table 3.2-1.

The PVNGS FSAR footnote 7.(h) to table 3.2-1 is based on our project design criteria.

In January,

1978, (which was prior to the PVNGS FSAR) footnote 7.(h) from our design criteria read as follows:

(h)

"Equipment, piping hangers and supports are designed to the same classification as the associated equipment or piping, except supports and hangers for non-Seismic Category I equipment,

piping, trays and ducts whose failure would result in unacceptable damage to safety related equipment during or after an SSE.

These hangers and supports shall be designed to withstand an SSE with no loss of structural integrity identified on location drawings as Seismic Category IX."

The term "Seismic Category IX" is defined in our project design criteria as follows:

"Seismic Category IX structures and components are those non Seismic Category I structures and components whose failure due to SSE loads could impact adjacent Seismic Category I structures or components.

Seismic Category IX structures and components shall be designed to experience no structural failure that might result in the malfunction of adjacent Seismic Category I structures or components when subjected to the vibratory motions of the SSE in combination with the normal operating loads."

This definition is based on Regulatory Guide 1.29, Revision 1 (Seismic Design Classification), position C.2.

In October,

1979, when the FSAR was completed, the footnote 7.(h) was para-phrased from the design criteria as follows:

"Hangers and supports are designed to the same classification as the associated equipment or piping when the equipment is required for safety.

In addition, supports and hangers for nonsafety-related systems are designed to Seismic Category I requirements when failure of the equipment of piping could adversely affect a safety related system."

An inappropriate word choice was made in the second sentence of this FSAR note.

The second sentence of the note should have stated "...analyzed to Seismic Category I..." instead of "...designed to Seismic Category I...".

When it is determined that a nonsafety-related structure,

system, or component could impact an adjacent Seismic Category I item, a dynamic or equivalent static ~anal sis is performed using the relevant building response spectra to demonstrate structural integrity.

These supports are designed to PVNGS Quality Class R criteria whereas Seismic Category I supports are designed to PVNGS Quality Class Q criteria.

About September,

1982, the project design criteria table was updated using the PVNGS FSAR table, thus bringing the incorrect word choice back into the design criteria.

~ ~

Mf'ttachment 2 (cont'd) ~

The PVNGS project work has been accomplished to the correct R.G. 1.29 criteria.

Field work was unaffected by this typo and this change has no technical significance.

The PVNGS FSAR and design criteria have been clarified so that the words reflect what the project position has been.

Also the term "Seismic Category IX" which should have been in the FSAR foot-note 7.(h) is being eliminated and appropriate words inserted in its place (as shown on Attachment 1).