ML16341C951

Requests Util Submit Proposed Secondary Water Chemistry Program to Be Incorporated in New License Condition. Current STS for All PWRs Are Ineffective Re Steam Generator Tube Degradation.Model License Condition Encl

ML16341C951
Person / Time
Site:	Diablo Canyon
Issue date:	08/02/1979
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Morrissey J PACIFIC GAS & ELECTRIC CO.
References
NUDOCS 7908130540
Download: ML16341C951 (10)

Text

Docket Nos:

50-275

.and 50-323 0

s 1.

-cE.

l AUG

'i 1979 I

M~J Distribution:

D ile RC PDR Local PDR LliR ¹1 File'.

F. Stolz B.

C. Buckley E.

G. Hylton ELD Mr. John C. Morrissey Vice President 8 General Counsel Pacific Gas 8 Electric Company 77 Eea'le Street San Francisco, Cali fornia 94106 ACRS NSIC TIC I8jE S.

Varga B. Moore

SUBJECT:

SECONDARY 'l4ATER CHEMISTRY CONTROL - DIABLO CANYON, UNITS 1

8 2 In late 1975 we incorporated provisions into the Standard Technical Specifi-cations (STS

) that required limiting conditions for operation and surveillance requirements for secondary water chemistry parameters.

The proposed Technical Specifications for your plant( s), as well as for other Pressurized k'ater Plants that have been issued an Operating License since 1974 or are now under review

=

for an Cperating License, contain either these provisions or a requirement to establish these provisions after baseline chemistry conditions have been determined.

The intent of the provisions was to provide added assurance that the operators of newly licensed plants would properly monitor and control secondary water chemistry to limit corrosion of steam generator tubes.

In a nmber of instances the Technical Specifications have significantly restricted the operational flexibility of some plants with little or no benefit with regard to limiting corrosion of steam generator tubes.

Based on this experience and the knowledge gained in recent years, we have concluded that Technical Specification limits are not the most effective way of assuring that steam generator tube corrosion will be minimized.

Due to the complexity of the corrosion phenomena involved and the state-of-the-art as it exists today, we believe that, in lieu of Technical Specifications, a more effective approach would be to institute a license condition that requires the implerftentation of a secondary water chemistry monitoring and control program containing appropriate procedures and admi n-istrative controls.

The required program and procedures uou1d be deve1oped by the 1icensee

( (Xg applicant) with any needed input from their reactor vendors or other consultants, and thus could more readily account for site and plant-specific factors that affect chemistry conditions in the steam generators.

In our that

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Nr. John C. Yorrissey AUG 2, 1979 Consequently, we request that you submit within 60 days your proposed secondary water cheaistry program which will be referenced in a condition to your operating license and will replace any proposed Technical Specifications on secondary wa'ter chemistry.

A model license condition is enclosed.

Me have concluded that such a license condition, in conjunction with existing Technical Specifications on steam generator tube leakage and inservice inspection, would provide the most practical and comprehensive means of assuring that steam generator tube integrity would be maintained.

k If you have any questions, please, contact us.

Sincerely, opggjzgL1 sag>9P ~7 goop, St,"015 ~"

John F. Stolz, Chief

', Light Pater Reactors Branch th.

1

'ivision of Project Hanagement

Enclosure:

Hodel License Condition cc w/enclosure:

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ENCLOSURE MODEL LICENSE CONDITION SECONDARY WATER CHEMISTRY MONITORING The licensee shall implement a secondary water chemistry monitoring program in accordance with (reference Licensee's'rocedure) to inhibit steam gene'rator tube degradation.

This program includes:

1 ~

Identification of a sampling schedule for the critical parameters and of control points for these parameters;,

2.

Identification of the procedures used to measure the. value of the critical

'parameters; 3;

Identification of process sampling points; 4.

Procedure for the recording and management of data; 5.

Procedures defining corrective actions for off-control point chemistry conditions; and 6.

A procedure identifying (1) the authority responsible for the, interpretation of the data and (2) the sequence and timing of administrative events required-to initiate corrective action.

7

Mr. John C. Morrisse 1

AUG

?

1979 Mr. John C, Morrissey Vice President

& General Counsel Pacific Gas

& Electric Company 77 Beale Street

,San Francisco, California 94106 CC'hilip A. Crane, Jr.,

Esq.

Pacific Gas

& Electric Company-77 Beale Street San Francisco, California 94106 Janice E. Kerr, Esq.

California Public Utilities Commission 350 HcAllister Street San Francisco, Cal.ifornia 94102 Hr. Frederi ck Ei ss1 er, Pres ident Scenic Shoreline Preservation Conference, Inc.

4623 More Mesa Drive Santa

Barbara, California 93105 Hs. 'Elizabeth E; Apfelberg 1415 Cazadero San Luis Obispo, Cal,ifornia 93401 Hs.

Sandra A. Silver 1792 Conejo Avenue San Luis Obispo, California

,93401 Hr, Gordon A. Silver 1792 Conejo Avenue San Luis Obispo, California 93401 Paul C. Valentine, Esq.

321 Lytton Avenue Palo Alto, California 94302 Yale I. Jones, Esq.

19th F.1oor 100 Van Ness'venue San Francisco, California 94102 Hr. Richard Hubbard MHB Technical Associates 1723 Hamilton Avenue Suite K

San Jose, California 95125 Mr. John Marrs Managing Editor San Luis Obispo County Telegram - Tribune 1321 Johnson Avenue P.

0.

Box. 112.

San Luis Obispo, Califortlib 93406 Elizabeth S.

Bowers, Esq.,

Chairman Atomic Safety

& Licensing Board U.

S. Nuclear Regulatory Commission Washington, D.

C.

20555 Hr. Glenn 0. Bright-Atomic Sa fe ty

& Licens i ng Boa rd U.

S. Nuclear Regulatory Commission Washington, D.

C.

20555 Tolbert Young P. 0.

Box 219 Avila Beach, California 93424 Richard S.

Salzman, Esq.,

Chairman Atomic Safety

& Licensing Appeal Board U.

S. Nuclear Regulatory Commission Washi'ngton, D.

C.

20555 Dr.

W, Reed Johnson Atomic Safety

& Licensing Appeal Board U.

S. Nuclear Req'ulatory Commission Washington, D.

C.

20555 Alan S.

Rosenthal, Esq.

Atomic Safety

& Licensing Appeal Board U.

S. Nuclear Regulatory Commission Washington, D.

C.

. 20555 Ms.

Raye Fleming 1746 Chorro Street San Luis Obispo, California 93401 Brent Rushforth, Esq.

Center for Law in the Public Interest

.10203 Santa Monica Boulevard Los Angeles, California 90067 Arthur C. Gehr, Esq.

-Snell

& Wilmer 3100 Valley Center

Phoenix, Arizona 85073

w 1

Mr,. John C. Morrissey AUG

-'979 Mr. James

0. Schuyler, Nuclear

. Projects Engineer Pacific Gas A Electric Company 77 Beale Street San Francisco, California 94106 Bruce Norton, Esq.-

3216 North 3rd Street Suite 202 Phoenix, Arizona 85012 Mr.

W.

C. Gangloff Westinghouse Electric Corporation P. 0.

Box 355 Pittsburgh, Pennsylvania 15230 Michael R. Klein, Esq.

Wilmer, Cutler

& Pickering 1666 K Street, N.

W.

Washington, D.

C.

20006

'avid F. Fleischaker, Esq.

1025 15th Street, N.

W.

5th Floor Washington, D.

C.

20006 Dr. William E. Martin Senior Ecologist Battelle Memorial Institute

Columbus, Ohio 43201

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