ML16342B070
| ML16342B070 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 11/02/1979 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Morrissey J PACIFIC GAS & ELECTRIC CO. |
| References | |
| NUDOCS 7911190238 | |
| Download: ML16342B070 (14) | |
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Docket Files NRC PDR NOV 2 t979Local PDR LHR 1 File D. Vassallo D. Ross S.
Varga F. Williams J. Stolz B. Buckley E. Hylton R. Mattson S.
Hanauer J.
P. Knight R. Tedesco R.
DeYoung V. Moore M. Kreger M. Ernst R. Denise Docket Nos. 50-275 and 50-323
Dear Mr. Morrissey:
Mr. John C. Morrissey Vice President 8 General Counsel Pacific Gas 8 Electric Company 77 Beale Street San Francisco, California 94106 R. Hartfield, ELD IE (3)
D. Crutchfield bcc:
SUBJECT:
ENVIRONMENTAL QUALIFICATION OF CLASS IE INSTRUMENTATION AND ELECTRICAL EQUIPMENT (DIABLO CANYON, UNITS 1
8I 2)
During our review of the Diablo Canyon, Units 1
8 2 application for an operating license we have been evaluating the environmental qualifications of Class IE instrumentation and electrical equipment.
This evaluation is being performed on a generic basis as well as plant specific both for equipment supplied by the NSSS supplier as well as equipment supplied for the Balance-of-Plant.
As a result of our avaluation we have requested and you have supplied information regarding this matter.
The information provided by you is 'sub-stantial and is presented in sections of the Final Safety Analysis Report as well as by reference to Westinghouse Topical Reports and specific equipment testing reports.
As you know, requirements for environmental qualification of Class IE instru-mentation and equipment have been evolving as a result of considerable effort expended by both the staff and nuclear industry.
As a result of these efforts we have developed an interim position regarding environmental qualifications.
A draft copy of this position is enclosed.
Prior to completion of our review of the qualification related documentation you have submitted as part of the Diablo Canyon application, we plan to assess the degree to which the qualification programs described in that document action comply with the guidelines contained in our interim position.
As part of this
.assessment, we plan to identify that equipment which was not qualified in accordance with our guidelines and, provided it is justified, we will establish a basis for the acceptability of these de'viations.
To assist us in completing this task promptly, we request that you provide the information identified in the Enclosure.
OFFICE/
SURNAME DATE).
NRC FORM 318 (9 781 NRCM 0240 AU.S. GOVERNMENT PRINTING OFFICE: 1979'289 389
C V F E
Hr.'ohn C. Horrissey NOV 2 ~g7g This information should allow us to complete our evaluation and make the determination that the environmental qualification of Class IE instrumen-ta'tion and electrical equipment is acceptable.
Please conform us within seven days after receipt of this letter of your schedule for providing this information.
Sincerely,
Enclosure:
Request for Additional Information Qyf@11g $jgtlCd bg gIIhn F. Sto]Z John F. Stolz, Chief Light Mater Reactors Branch Ho.
1 Division of Project Management cc:
See next page OFFICE $
SURNAME DATE$
,....LMR.1........... LHR. 1.
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/79 11/
/79 NRC FORM 318 (9.76) NRCM 0240 AU.S. GOVERNMENT PRINTING OFFICE1979 289 369
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Hr. John C. Horrissey NOV 2 1979 cc:
Philip A. Crane, Jr.,
Esq.
Pacific Gas
& Electric Company 7? Beale Street San Francisco, California 94106 Janice E. Kerr, Esq.
California Public Utilities Commission 350 HcAllister Street San Francisco, California 94102 Hr. Frederick Eissler, President Scenic Shoreline Preservation Conference, Inc.
4623 More Mesa Drive Santa Barbara, California 93105 Hs. Elizabeth E. Apfelberg 1415 Cazadero San Luis Obispo, California 93401 Hs.
Sandna A. Silver 1760 Alisal Street San Luis Obispo, California 93401 Mr. Gordon A. Silver 1760 Alisal Street San Luis Obispo, California 93401 Paul C. Valentine," Esq.
321 Lytton Avenue Palo Alto, California 94302 Yale I. Jones, Esq.
19th Floor 100 Van Ness Avenue San Francisco, California 94102 Hr. Richard Hubbard HHB Technical Associates Suite K "
1723 Hamilton Avenue San Jose, California 95125 Hr. John Harrs Managing Editor San Luis Obispo County Telegram - Tribune 1321 Johnson Avenue P.
0.
Box 112 San Luis Obispo, California 93406 Elizabeth S.
Bowers, Esq.,
Chairman Atomic Sa ety 8 Licensing Board U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555 Mr. Glenn 0. Bright Atomic Safety
& Licensing Board 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 Washington, D.
C.
20555 Dr.
W.
Reed Johnson Atomic Safety
& Licensing Appeal Board U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555 Alan S. Rosenthal, Esq.
Atomic Safety
& Licensing Appeal Borad U.
S. Nuclear Regulatory Commission Washington, D.
C.
20555 Hs.
Raye Fleming 1920 Hattie Road Shell Beach, California 93440 Brent Rushforth, Esq.
Center for Law in the Public Interest 10203 Santa Monica Boulevard Los Angeles,,Cali forni a 90067 Arthur B. Gehr, Esq.
Snell
& Wi lmer 3100 Valley Center Phoenix, Arizona 85073 Hr.
James
- 0. Schuyler, Nuclear Projects Engineer Pacific Gas
& Electric Company 77 Beale Street San Francisco, California 94106
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Mr. John C. Horrissey cc:
Bruce Norton, Esq.
3216 North 3rd Street Suite 202
- Phoenix, Arizon'a 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 David F. Fleischaker, Esq.
Suite 709 1735 Eye Street, N.
W.
Washington, D.
C.
20006 Dr. William E. Martin Senior Ecologist Battelle Memorial Institute
- Columbus, Ohio 43201 W. Andrew Baldwin, Esq.
124 Spear Street San Francisco, California 94105 NOV 2 1978
ENCLOSURE ADDITIONAL RE/VEST FOR INFORMATION (Equi pment qua 1 ifi ca tion) 1.
The FSAR Tables that identify the operational requirements of equipment which must function during and subsequent to the design basis accidents are general and are not sufficiently complete for purposes of documenting equipment qualification parameters.
Therefore, provide a table listing of'all Class IE safety-related equipment and appropriate qualification rela'ted data for each as noted in the attachment.
This table should include'all equipment located both inside and outside of containment,'ncluding balance-of-plant and nuclear steam system supplied equipment.
Where compon'ents have been qualified'y an equipment system test, identi-fication of the equipment is sufficient, i.e., individual components need not be listed:
Equipment components should be identified where qualified by separate tests or analysis.
Where more than one item of a given type is used, it is only necessary to present the required information for one representative item of that type for the worst case environment.
For equipment located outside containment which may not have been qualified to abnormal environmental conditions, the environmental design requirements for this equipment should be provided and noted as such in column 5.
For each'area of.'the plant where such equipment is located the normal operating extremes in environmental conditions should be provided and noted as such in.'column'4..
A footnote should be provided for each such area to provide the basis thai the normal operating extremes in environmental 'conditions wil'1'ot be exceeded.
Such basis should include the quality of environ-mental control systems, their redundancy, sources of power and cooling, and operating requirements to maintain suitable environmental conditions during all modes of plant operation.,
The monitoring of enviornmental conditions in such areas and of the equipment controlling such environments should also be addressed to provide assurance that such conditions are maintained.
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IEEE std. 323-1971 does not specifically address aging mechanisms as a
consideration in-the qualification of safety related electrical equipment.
Subsequently, IEEE Std. 323-1974 addressed aging in the sequence of factors to be considered.
'Nhile for many omponents, aging may not play a signi ficant role in the ability of a component to withstand the effects of an abrorl'ill or accident environment and still perform its required function; there
~re certain materials which may be subjected to degradation over a long period of time.
It is the staff's position that applicants with qualification programs for safety-related electrical equipment, conducted in accordance with IEEE Std. 323-1971, should undertake an investigation of the electrical equipment to ensure.that significant aging mechanisms do not exist which could invalidate the conclusions of prior qualification.
Sources of information, specifically material manufacturers
- data, should be consulted as" a,part of this review., Therefore, you are requested to conduct such an evaluation and to report your findings at the earliest opportuni ty.
For any equipment for which significant aging mechanisms are identified, provide the justification and time interval for acceptable use of this equipment which does not invalidate its prior qualification or provide other proposed alternatives such as requalification or replacement wi th qualified equipment and not subject to aging concerns.
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'ype of
- qui pmen t/
.ocation(8) ttanufacturer Hodel tlo. or Identification no.
(g)
EXAttPLE TASLE EttVIROttHEtlTAL QUALIFICATION OF Abnormal or Environnmnt Accident to Hhich Environment(1)
Qualified(2)
ELECTRICAL EQUIPtlEtlT 6
t Operabi l I ty Requirements (3) 7 8
9 10 Operability Accuracy Accuracy Qual ification Demonstrated Requirements Demonstrated Report and (4)
(3)
(6)
Hcthod (7)
- I)
Temperature and pressure as a function of time, time interval for containment sprays, and total integrated radiation dose for equipment location.
Include submergence if applicable.
Reference may be made to figures in FSAR or other docketed material for pressure and temperature envelope.
Other information should be listed in this table.
2)
Temperature and pressure, as a function of time, time interval containment sprays simulated, and total integrated raidation dose for which equipment was qua) ified. If the same piece of equipment was*not subjected to all environmental conditions, describe separate effects testing and justify.
Include submergence test if applicable.
Reference may be made to tigures for qualification envelopes or actual test conditions for prcssure and temperature conditions noted in qualification reports submitted ior staff review.
Other information should be listed in this table.
'.3)
Time that equipment is required to operate during and subsequent to a design basis event consistent with plant safety analysis.
Distinguish between trip functions and post accident monitoring for sensors and transmitters if accuracy requirements differ for these functions.
'.4)
Time that equipment operability was demonstrated by qualification method.
Distinguish between trip functions and post accident monitoring for sensors and transmitters if accuracy requirements differ for these functions.
- 5)
Provide the accuracy requirements for sensors and transmitters for trip functions and post accident monitoring as used In plant safety analysis.
tlote applicability of each if they differ.
'6)
Accuracy for sensors and transmitters should distinguish between trip functions and post accident monitoring if requirements differ for these functions.
7) tlcthod should indicate test, analysis or combination as applicable.
If qualification considered aging include in this colum tire qualified life and accelerated aging time and temperature conditions used.
8)
For ICE condenser containments, specify upper or lower compartment.
9) ttodct or identification number should be adequate to define specific equipment identity (do not prov'idc plant. specific tag item number).
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