ML20125B200

Forwards Draft Interim Staff Position on Environ Qualification of Safety-Related Electrical Equipment. Requests Addl Info & Schedule for Info Provision

ML20125B200
Person / Time
Site:	North Anna
Issue date:	10/11/1979
From:	Parr O Office of Nuclear Reactor Regulation
To:	Proffitt W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
Shared Package
ML20125B202	List: ML20125B200 ML20125B205
References
REF-GTECI-A-24, REF-GTECI-IS, RTR-NUREG-0588, RTR-NUREG-588, TASK-A-24, TASK-OR NUDOCS 7910250009
Download: ML20125B200 (7)

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Docket File bec:

LWR # File JBuchanan, NSIC OCT 111979 - DVassallo TAbernathy, TIC' Dross ACRS (16) l' SVarga l

. FW1111ams l OParr i Docket No.: 50-339 ADromerick .

l MRushbrook (w/ extra copies) l' . RMattson-

- . SHanauer Mr. W. L. Proffitt ~

JKnight Senior Vice President - Power RTedesco Operations RDeYoung

! Virginia Electric and Power Company VMoore

! P. O. Box 26666 NErnst -

Richmond, Virginia 23261

. RDenise ELD' Oear Mr. Proffitt: <

SUBJECT:

ENVIRONMENTAL' QUALIFICATION OF CLASS IE INSTRUMENTATION AND ELECTRICAL EQUIPMENT .

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During our review of'the . North Anna Power Station, ifnit 2 application for an

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t operating license we have been evaluating the environmental qualifications

i. of Class IE instrumentation and electrical equipment. This evaluation is-

! being performed on a generic basis as well as plant sp' e cific both for equip .

l ment supplied by the NSSS supplier as well as equipment supplied for the

! Balance-of-Plant. As a result of our evaluation we have requested and you -

have supplied information regarding this matter. The information provided by you is substantial and is presented in sections of the Final Safety

, Analysis Report as well as by reference to Westinghouse Topical Reports and specific. equipment testing repot,ts.

As you know, requirements for environmental qualification of Class IE l instrumentation and equipment have been evolvi.ng 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 North Anna 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, e we will establish a basis for the acceptability of these deviations. To assist us in completing this task promptly, we request that you provide the information identified in the Enclosure.

P00R ORGEL 7910250 DO 9 A

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Mr. W. L. Proffitt '2--

OCT 111979 This information should allow us to complete our evaluation and make the determination that thc environmental qualification of Class IE instrumen-tation and electrical equipment is acceptable.

Please inform us within seven days after receipt of this letter of your schedule for providing this information.

Sincerely, Origw.a1 wd by olan Parr Olan D. Parr, Chief Light Water Reactors, Branch No. 3

- Division of Project Management

Enclosure:

As Stated cc: See Next Page f

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M IURM 314 (9 76) M 0889 8w es **we==assat ***aviae **,,em e s e s e . se e . .ee -

Mr. .W. L. Prof fitt-Senior Vice President - Power Operatior.s Virginia Electric & Poher Company P. O. Box 26666 Richmond, Virginia 23261 cc: Mr. Anthony Gambaradella Cl arence T. Kipps, Jr., Esq.

Office of the Attorney Ceneral 1700 Pennsylvania Avenue, N.W.

11 South 12th Street - Room 308 Washington, D. C. 20006 Richmond, Virginia 23219 Carroll J. Savage , Esq.

Richard M. Foster, Esq. 1700 Pennsyl vania Avenue , N.W.

211 Stribling Avenue Washington, D. C. 20006 Charlottesville, Virginia 22903 Mr. James C. Dunstan Michael W. Maupin, Esq. State Corporation Commission Hunton, Williams, Gay & Gibson Conmonvealth of Vi rgin'a P. O. Box 1535 Blandon Building Richmond, Virginia 23212 Richmond, Virginia 23209 Mrs. June Allen Alan S. Rosenthal , Esq.

412 Owens Drive Atomic Safety and Licensing Appeal Board Huntsville, Alabana 35801 U.S. Nuclear Regulatory Cormission Washington , D. C. 20555 Fr. James Torson 501 Leroy Michael C. Farrar, Esq.

Socorro, New Mexico 87801 Atomic Safety and Licensing Appeal Board U.S. Nuclear Regulatory Commission Mrs. Margaret Dietrich Washington , D. C. 20555 Route 2, Box 568 Gordonsville, Virginia 22942 Dr. John H. Buck Atomic Safety and Licensing Appeal Board Willi am H. Rodgers, Jr. , Esq. U.S. Nuclear Regulatory Commission Georgetown University Law Center Washington, D. C. 20555 600 New Jersey Avenue, N.W.

Washington, D. C. 20001 Atomic Safety and Licensing Board Panel U.S. Nuclear Regulatory Commission Fr. Peter S. Hepp Washington, D. C. 20555 Executive Vice President Sun Shipping & Dry Dock Company Mr. Michael L. Kidd P. O. Box 540 U.S. Nuclear Regulatory Connission Chester, Pennsylvania 19013 P. 0. Box 128 Spotsivania, Virginia 22553 Mr. R. B. Briggs Associate Director Dr. Paul W. Purdom 110 Evans Lane Department of Civil Engineering Oak Ridge, Tennessee 37830 Drexel University Philadel phia, Pennsylvania 19104

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Mr. W. L. Proffitt cc : Dr. Lawrence R. Quarles Apartment No. 51 Kendal-at-Longwood Kennett Square, Pennsylvania 19348 Mr. Irwin B. Kroot Ci ti zene. Energy Forum P. O. Lox 138 McLean, Virginia 22101 James B. Dougherty, Esq.

Potomac Alliance ,

1416 S Street , N.W.  !

Washington, D. C. 20009 l

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& 6 ADDlTf0NAL REQUEST FOR 1NFORMAT10N NORTH ANNA POWER STATION, UNIT 2 ,

(Equipment Qualification)

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 do not provide sufficient information for the review of equipment qualification. Therefore, provide a table listing of all Class IE safety-related equipment and appropriate qualification related data for each as noted in the attachment. This table should include all equipment located both inside and outside of containment, including balance-of-plant and nuclear steam system supplied equipment.

Where components have been qualified by an equipment system test, identification 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 that the normal operating extremes in environmental conditions will not 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 ebvironmental conditions in such areas and of the equipment controlling such environmencs should also be addressed to provide assurance that such conditions are maintained.

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2. 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. While for many components, aging nay not play a significant role in the ability of a component to withstand the effects of an abnormal or accident environment and still perform its required function; there are 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 opportunity. 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 with qualified equipment and not subject to aging concerns.

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'EXAt1PLE TABLE y

.EtWIR0fttErlfAL QUALIFICAT10ti 0F ELECTRICAL EQUIPt1LitT ,

1 2 3 4 5 6 7 8 9 10 s

'ype of Manufacturer Model tio. or Abnormal or Environment Operability Operability i

quipnent/ Identi fication Accuracy Accuracy Qualification Accident to Which Requirements

.ocation(8) tio. (9) Demonstrated Requirements Demonstrated Report and l Environnent(s) Qualified (2) (3) (4) (3) (6) Method (7)

(1)

Tenperature Include subaergence and pressure as a function of time, time interval for containment sprays, and total integrated radiation dose for equipment locattoia.

if appitcable.

Other inforaution should be listed in this table. Reference may be made to figures in FSAR or other docketed material for pressure and teoperature envelope.

l2)

Temperature equipuent wasand pressure, as a function of time, time interval containnent sprays simulated, and total integrated raidation dose for which qualified.

jus ti fy . Include submergence test if applicable.If the same piece of equipment was not subjected to all environmental conditions, describe separate effects tes pressure and temperature conditions noted in qualification reports submitted for staff review. Reference may be nede to tigures for qualification envelopes or (3) Other infor1 nation should be listed in this table.

Time that equipeent is required to operate during and subsequent to a design basis event consistent with plant safety analysis.

between trip functions and post accident monitoring for sensors and transmitters if accuracy requirenents differ for these functions. Distinguish (4) Time that equipaent and transmitters operability if accuracy was denonstrated requirenents by functions.

differ for these qualification sethod. Distinguish bctween trip functions and post accident monitoring for sensors (5)

Note applicability of each if they differ. provide the accuracy requireuents for sensors and transmitters for trip functions and post accident monitoring as (6)

Accuracy for sensors and transmitters should distinguish between trip functions and post accident monitoring if requirements differ for these functions (7) .

Hethod accelerated should indicate aging time and test, analysis or temperature conbination conditions used.as applicable. If qualification considered aging include in this column the qualf fled life and (8) for ICE condenser containments, specify upper or lower conpartment.

(9)

Model or identification number should be adequate to define specific equipaent identityldo not provide plant specific tag item number).

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