ML20031F383

Audit of Environ Qualification of Safety-Related Electrical Equipment at Virgil C Summer Nuclear Station

ML20031F383
Person / Time
Site:	Summer
Issue date:	08/31/1981
From:	Hinton M, Holloway E EG&G, INC.
To:	Rosztoczy Z Office of Nuclear Reactor Regulation
References
CON-FIN-A-6453 EGG-EA-5537, IEB-79-01B, IEB-79-1B, NUDOCS 8110190700
Download: ML20031F383 (21)

Text

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AUGUST 1981 l

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AUDIT OF THE ENVIRONMENTAL QUALIFICATION OF 4/g[

AlflS SAFETY-RELATED ELECTRICAL EQUIPMENT AT THE

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U.S. Department of Energy

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This is an informal report intended for use as a preliminary or working document Prepared for the U.S. Nuclear Regulatory Commission Under DOE Contract No. DE-AC07-761D01570 FIN No. A3453 EGnG,s.n.

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E idaho. Inc FORM EG&G 398 (Rev.1179)

INTERIM REPORT Accession No.

Report No. EGG-EA-5537 Contract Program or Project

Title:

Equipment Qualification Case Reviews Subject cf this Document:

Audit of the Environmental Qualification of Safety-Related Electrical Equipment at the Virgil C. Summer Nuclear Station Type of Document:

Technical Evaluation Report Author (s):

M. F. Hinton E. R. Holloway

.NRC ResearC1300 0C10108l 1

i Assistance Report o* o' o=umea':

August 1981 Responsible NRC Individual and NRC Office or Division:

Z. R. Rosztoczy, Division of Engineering This document was prepared primarily for preliminary or internat use. it has not received full review and approval. Since there may be substantive changes, this document should not be considered final.

EG&G Idaho, Inc.

Idaho Falls, Idaho 83415 Prepared for the U.S. Nuclear Regulatory Commission Washington, D.C.

Under DOE Contract No. DE-AC07 761D01570 NRC FIN No.

A6453 INTERIM REPORT l

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0530J AUDIT-0F THE ENVIRONMENTAL. QUALIFICATION OF SAFETY-RELATED ELECTRICAL EQUIPMENT AT THE VIRGIL C. SUMMER NUCLEAR' STATION Docket No. 50-395 Martin F. Hinton Ernest R. Holloway Reliability and Statistics Branch Engineering Analysis Division EG&G Idaho, Inc.

NRC Research anc Technical Assistance Report

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ABSTRACT The Virgil C. Summer Nuclear Station was audited to determine the envrionmental qualification of safety-related electrical equipment. Results of the audit are summarized in this report.

FOREWORD This report is supplied as part of the " Equipment Qualification Case Reviews" being conducted for the U.S. Nuclear Regulatory Commission, Office of Nuclear Reactor regulation, Division of Engineering Iquipment Qualifi-cation Branch by EG&G Idaho, Inc., Reliability and Statistics Branch.

The U.S. huclear Regulatory Commission funded the work under the authorization, 6&R 20-19-04-15, FIN No. A6453.

ii

CONTENTS

'.0 INTRODUCTION....................................................

I 2.0 EVALUATION......................................................

1

3.0 CONCLUSION

S.....................................................

3

4.0 REFERENCES

3 APPENDIX A--QUALIFICATION DEFICIENCIES FOR INDIVIDUAL EQUIPMENT ITEMS.................................................

4 APPENDIX B--SUMMARIES OF VCSNS CENTRAL FILE REVIEWS..................

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AUDIT OF THE ENVIRONMENTAL QUALIFICATION OF SAFETY-RELATED ELECTRICAL EQUIPMENT AT THE VIRGIL C. SUMMER NUCLEAR STATION

1.0 INTRODUCTION

On July 19-24, 1981 a team comprised of representatives of the Relia-bility and Statistics Branch of EG&G Idaho, Inc. and NRC staff conducted an audit of the envrionmental safety related electrical equipment for the Virgil C. Summer Nuclear Station (VCSNS).

The work effort consisted of:

(1) a pre-audit review of the licensee's submittal (Ref.1), (2) an audit of the licencee's central files for selected equipment items, and (3) an onsite visual inspection of the equipment items for which the central files were audited.

Qualification deficiencies for individual equipment items are provided in Appendix A.

Summaries of the central file reviews are provided in Appendix B.

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2.0 EVALUATION General concerns and comments resulting from both the audit and the pre-audit review of the VCSNS submittal are as follows:

(1) On the USSS equipment all of the required information is not available in the summary sheets; the summaries refer to figures and test reports that are not available.

Either the figures were not included or the test reports were proprietary.

(2) Similar items are listed several times even though only the harsh-est environment need be addressed.

(3) Some of the environmental time-temperature graphs only cover 100 seconds, which is insufficient.

In some cases the last noteo temperature is greater than the finsl test temperatures.

Those 1

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' concerns were' addressed during the audit and VCSNS should provide Lan adequate response on the submittal revision.

f (4) The description of the aging program that is included in the sub-mittal is not clear. During the audit VCSNS demonstrated that i -

their aging'and on-going-surveillance program had been well thought out and will be integrated with their maintenance pro-gram. This should ensure a good on-going program to maintain-the qualification of safety related electrical equipment. The sub-

.mittal revision should reflect this program.

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(5) The " Items Exempt From Qualification" list has at least 14

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changes. These changes need to be included in the submittal revision.

(6) VCSNS has indicated that an independent review will be performed l-to verify total ~ integrated dose calculations for specific equipment.

(7) To insure the proper installation of safety-related cables, VCSNS l

has indicated that they have a good QA/QC program which should 1

ensure the qualified status of these cables will be ma'intained.

-(8) Comparisons were made between the VCSNS safety system list and the NRC generic safety system list-and between the VCSNS emer-gency operating procedures instruments list and the NRC generic-list during the audit. A summary of these comparisons should be included in the next submittal revision.

(9) There are severa' items on the "NSSS/ BOP Qualification Concerns" lists that are not in the submittal summary and should be included in the submittal revision.- These-items are acoustical critical leak monitoring system, 15 ASCO valves, and Rotork Valve Motor Operators.

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(10) The "NSSS/ BOP Qualification Concerns" lists have motor lubricants listed because VCSNS is planning to use GULF oil products in all i

their equipment instead of vendor recommended lubricants. The GULF oil products still have to be qualified before any plant motors that use GULF lubricants can be considered qualified.

If VCSNS intends to use GULF lubricants in valve operator gear boxes, the valve motor operators are also lacking in their qualification.

3.0 CONCLUSION

S As a result of the audit it was concluded that VCSNS has demonstrated a high level of effort toward the E.Q. program. When VCSNS resolves the concerns noted above, their programs should be complete and in accordance with NUREG-0588.

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4.0 REFERENCES

1.

Environmental Qualification Per Requirements of NUREG-0588, Revision 3, South Carolina Electric & Gas Company Virgil C. Summer Nuclear Station.

4 2.

Interim Staff Position on Environmental Qualification of Safety-Related Electrical Equipment, NUREG-0588.

3.

IEEE Standard for Qualifying Class lE Equipment for Nuclear Power Generating Stations, IEEE Std. 323-1974.

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APPENDIX A QUALIFICATION DEFICIENCIES FOR INDIVIDUAL EQUIPMENT ITEMS The legend for entries in tiie deficiency and utility evaluation columns is as follows:

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- Incomplete qualification pro,ess II - Information in submittal incomplete M - Margin Qualification process not complete or item not qualified N

P - Pressure Q - Qualified T - Temperature O

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NSSS EQUIPMENT No. of Utility Page Equipment Description Items Manufacturer Mcdel Number Evaluation Deficiency W-1 RTD 12 Rosemont 176KF Q

M,II W-10 Hydrogen Recombiner 2

b[ Sturtevant Elec Type A Q

M,II Heaters W-13 Pumo Motor (l) 2 WLMD Buffalo 5008 Q

Q(2)

W-14 Pump Motor 3

WLMD Buffalo 6809 Q

Q(2)

W-15 Valve Operator Motor 41 Limitorque SBD-3 Q

0 thru SMB-00 W-18 SB-00 SB-,

SB-2 W-2 Pressure Transmitter 2

Barton 752 N

I W-3 Pressure Transmitter 3

Barton 763 Lot 2 N

I W-4 Level DP Transmitter 12 Barton 764 Lot 2 N

M,I W-5 W-6 Pressure Transmitter 11 Barton 763 Lat 2 N

M,I W-8

NSSS EQUIPMENT (continued)

No. of Utili..y Page Eauipment Descriotion Items Nanufacturer Model Number Evaluation Deficiency W-ll Valve Operator Motor 8

Limitorque SB-2 N

I W-12 SBD-3 SMB-00-10 1.

Reviewed during site audit.

2.

Bearings and lobe oils reonire dccumentation.

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80P EQUIPMENT No. of Utility Pace Equipment Description Items Manufacturer Model Number Evaluation Deficiency B-1 Motor Control Center 1

Square D 4

Q I(2)

B-1 Valve Solenoid 4

Asco WP-HVA-206-Q 0

B-ll 381-3RVU B-12 B-2 Valve Solenoid 14 Asco NP8316 Q

Q B-3 B-4 B-6 B-12

-a B-3 Valve Solenoid 2

Asco NP8316 0

I(2)

B-9 Valve Solenoid 4

Asco 206-?81-7F Q

Q B-10 Valve Solenoid 9

Asco NP8323 Q

Q B-ll B-13 Valve Solenoid 4

Asco NP8320 Q

Q B-13 Valve Solenoid

.1 Asco 206-381-3RFV Q

0 B-15 Valve Solenoid 3

Asco 206-381-3F Q

Q B-16 Valve Solenoid 4

Asco NP8321ASE Q

Q B-2 Valve Solenoid 4

Asco NP8316 N

I B-3 B-4 l

i BOP EQUIPMENT (continued)

No. of Utility Page Equinment Description Items Manufacturer Model Number Evaluation Deficiency B-11 Valve Solenoid 4

Asco NP8323' N

I B-ll Valve Solenoid 6

Acco WP-HVA-206-N I

381-3RVU B-13 Valve Solenoid 1

Asco NP-1 N

I B-15 Valve Solenoid 3

Asco 206-381-3F N

I B-1 Valve Solenoid (l) 3 Allied (3) 321X-21 Q

Q B-16 Valve Solenoid 8

Valcor V526-5292-20 N

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B-17 B-17 Valve Solenoid 12 Valcor V526-5293-6 N

I,M B-18 B-19 B-3 Valve Motor Operator 43 Limitorque SMB-00,5 Q

Q B-4 SMB-000-5 B-5 SMB-00-15 B SMB-00-10 B-7 SMB-005 B-8 SMB-000-2 B-9 SMB-000-5 B-10 SMB-00 B-14 SMB-005-10 B-15 SMB-002/H2BC SMB-0002/HOBC SMB-0005/H2BC

80P EQUIPMENT (continued)

No. of Utility Page Equioment Description Items Manufacturer Model Number Evaluation Deficiency B-2 Valve Motor Operator 1

Limitoraue SMB-000-5 N

I(Mounting)

B-14 Valve Motor Operator 4

Limitorque SMB-000-5/H2BC Q

T B-19 Valve Motor Operator 4

Limitorque SMB-00-10 N

I(Mounting)

B-21 CCW Pump Motor l

Westinghouse PAM/3B40 N

I(Rein-LRA sulated)

B-21 CCW Pump Motor (I) 2 Westinghouse PAM/3B40 Q(4)

I(5)

LRA u)

B-22 Spray Pump Motor 2

General 5KP?l055C44 Q(4)

I(2)(4)

Electric B-22 Control Cable Kerite FR-FR N

I B-23 Power Cable Kerite HT-FR N

I B-23 Instrument Cable (l)

Samuel Moore EPDM-HYPALON Q

I B-24 PowerCable(l)

Okonite EPR-HYPALON Q

I(2),p B-24 Triaxial Cable Boston Ins.

XLPE-TEFZEL Q

Q Wire XLPE-HYPALON B-25 Switchboard Wire Raychem Flamtrol Q

I(2)

B-25 Switchboard Wire Rockbestos Firewall SIS Q

I(2)

B-26 RTD 3

PYC0 122-1010 N

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BOP EQUIPMENT (continued)

No. of Utility Page Equipment Description Items Manufacturer Model Number Evaluation Deficiency B-27 RTD(I) 13 PYC0 122-3006 N

I 122-4030 B-28 Flow Sensor 17 Rosemount 1153 DA4 0

Q B-29 1153 DAS B-31 B-30 Level Transmitter (l) 6 Rosemount 0-1153-0022-Q Q

B-31 0001 ll52DP4A B-32 Pressure Sensor 2

Rosemount ll52AP7 Q

Q o

B-32 High Range Cetector i

Victoreen 877-N I

B-33 Limit Switch 44 Namco EA-180 Q

P thru B-42 B-35 Limit Switch 27 Namco EA-180(6)

N P,I thru B-41 B-35 Limit Switch 3

Nemco EA-740 Q

P B-42 Fan Motor 4

Reliance 50030CZ N

I B-43 Fan Motor (l) 10 Reliance TEA 0 N

I B-44 B-46 Connectors D.G.0'Brien C39P0001-G01 N

P,T,1(2)

C39P101-G01

80P EQUIPMENT-(continued)

No. of Utility Pace Equipment Description Items Manufacturer Model Number Evaluation Deficiency B-46 Panetrations(I) 19 D.G.0'Brien Various N

P,T,I(2)

B-47 B-48 Tape Bishop Bi-Seal 3 N

I B-48' Tape Kerite Friction N

I B-49 Tape 3M Scotch No. 88 Vinyl N

I B-49

. Insulating Tape Kerite Type I N

I B-49 Glass Cloth Tape Permacel Class H N

I B-49 Silicon Rubber Tape 3M Scotch No. 70 N

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-B-49 Splicing Cement Kerite N/A N

I B-50 Tape-Seal Kearney Airseal N

I B-50

' Tape 3M Scotch No. 33 Vinyl N

I B Insulating Tape Okonite.

T95 N

I(2)

Jacketing Tape-

'0konite T35 Cement Okonite 604-45-8104 Raychem Thermofit HVT-N I(2)

B-51 Terminations B-52 CBN Raychem WCSF N

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B-52 Splicing Sleeve t

BOP EQUIPPENT (continued)

No. of Utility Page Equioment Description Items Manufacturer Model Number Evaluation Deficiency B-53 Cable Breakout Raychem 302A812-N I(2) 52-83 B-53 Panel 1

Field Fabri-N/A N

I(2) catad B-54 Transfer Switch 1

Terac/Gould HPL-C Q

I(2)

(1) Reviewed during site audit.

(2) Demonstrated operability "To Be Determined".

(3) Tnese valves are part of the Atwood-Merrill MSIV operators.

(4)

Except for oils, due to using Gulf oils rather than vendor oils.

(5)

Except for bearings and oils.

(6)

In containment.

APPENDIX B SUMMARIES OF VCSNS CENTRAL FILE REVIEWS Item: Westinghcuse LMD-Buff alo Motor, Model--Life Line D, 5008 Frame This motor is used to drive the Residual Heat Removal Pump, which is located in the Auxiliary Building on the 374 foot level..The bounding environmental parameters are temperature (ll8*F), pressure (0.1 psig),

7 humidity (100%), and radiation (2.3 x 10 Rads). The operability requirement is one year.

The documentation includes a detailed report in the submittal, a qualification check / summary sheet, a field verification check / summary _

sheet, and three WCAP information summaries (8754, 7829, and 9745). The documents are in agreement except for a model disparity in which the sub-mittal model numbers differ from the file numbers. Both of the numbers are found on the motor data plate.

The file data indicates that the insulation system is qualified by test including thermal aging and radiation exposure. The vendor's bearing and lubrication have also been qualified by test, but SCE&G wil_1 be.using a different manufacturer's lubrication. They have identified the need to l

qualify this lubricant and indicate that the plant maintenance schedule will call for lube inspection quarterly and lube replacement semi-annually.

the lubrication qualification remains an open item.

Item: Allied Solenoid Valve--Model 321X-21 The Allied solenoid valves are used on the main steam isolation valve actuators, located in the intermediate building in room 3602. Bounding environmental qualification parameters are identified as temperature (283*F), pressure (2.4 psig), relative _ humidity (100%), and radiation l

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'{I (10 Rads). The required operating time wi!.hin an adverse environmer ' is 4-five seconds.

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The audit of the environmental qualification documentation indicated that a model 321X-22 was subjected to temperature (340 F), pressure 6

(104 psig), relative humidity (100%), and radiation (17.4 x 10 Raas).

The audit team questioned the validity of the test because the soleno;ds:

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where replaced during the test. The solenoids are required to operate only 960 tic.es during a 40 year life, and befort replacement the valves had been.

operated 4,672 times.

After replacement the solenoids were cycled 120 times,'

before the remainder of the test was run. This remainder included radia-tion, thermocycle aging, and abnormal (LOCA) environment.

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an on-going replacement program for seals and solenoids (every five y' ears),

the solenoid replacement, due to noise, during the mechanical test toes not seem tc be a problem.

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There was also a question on whether the installed valve is norinally energized and whether the tested valve was in the same conditiori. The' installed valve is normally energized and the tested valve was also ener-Q gized, with the only difference being that the tested valve used.?C and ty installed valve uses DC. This difference is insignificant.

,s The environmental qualification summary sheet indicated tnat't.he acci-

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dent temperature would be 212 F, but the FSAR showed a peak of 28 F.

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Since the temperature is at the peak for only about three seconds and then s

drops to 212 F this is considered insignificant.

l The test report also indicated a failure of one valve seat in the solenoid valves. A f ailure of this type could possibly prevent the main l

steam stop from closing within the specification time. This should not be a problem since there is an on-going program to regularly check the valve s,

j operating time.

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Item-W'cGtinghouse LRA Motor, Model--PAM, 3B40 Frame

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'M bis motor drives the component cooling water pump which is located in

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• the intermediate,bui2 Jing,)' room 1202. The specified environmental para-

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meters are temperat rejf'li?*F maximum), preisure (2.3 psic), relative humidity (100%),\\andlridiqtihn (500 d ds). The operability requirements is one ys.ar.

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-I s t0cun o tation includes a.cetailed re. port in the submittal, a

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_qualif ication entck/wmmary sheet, and " Supporting Documentation of Con-s-

formity" which contains a statement concerning design and construction x

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particulars andivarious descripti6ns of Wertinghouse insulation testing.

c "i [ alocallygEnerateddocuments4.cr.uratel')r'flectthesupportingdocuments.

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.'1 Theauditofthedocumentationinfichtedthatthemethodofqualifica-

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1. tiod'was a cogbination of partial te,st, analysis, and operating experience.

4 Thesusceptiblbmaterialg f constructlon were designated as the insulation, lubnT;ation, and'beardngs}. The motor is totally enclosed in a 4

sealed, wate,"-dpled enclosure and therefore will not be subjected to high

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3'Wemperatureoridyidity; Ar(ayalysisdemonstratestheenclosuresability i

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%to withstand the specified pressufe'f. "The life of the insulation is demon-a-

stratea by test and analysish Ti.e 16 raoiation level precludes the neces-Nx 3

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sit _yoftestor.'reivsisfokradiatied' effects.

The lubricating oil and beirings are p from adveite environment by the above-mentioned 3

enclosure and cooling. As-]precautionagainstbearingfailuretheutility phas established a maintenance schedule to' inspect the oil quarterly and

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replace it semisnnuallf.h. The utility has also demonstrated its ability to

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.pravide the system required,to involve lthe' motor maintenance in aging sur-g 1 m] 1, 9 kaillance and analysis.

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q In conclusioi1%he utility (95-9 sed a cooled, airtight enclosure to-Th'st nsulation has been qualified by test and 1 ' ameliorate the envircnment.'

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analysip "The oearings and h be a 7f are not considered to be subjected to aharsher{m:vitAnment, will be pdct ;c,f-the on-going surveillance program, and

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schedule.

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Item: Reliance Form Motor--Model TEA 0 This fan motor is used in cooling units in the auxiliary Lvilding and the intermediate building. The bounding environmental parameters include temperature (120*F), pressure (0.1 psig), humidity (100%), and radiation 0

(1.7 x 10 Rads). The coerability requirement is one year.

The qualification file includes detailed reports in the submittal, check / summary and field verification sheets, and the NUC-9 test report.

The NUC-9 is a summary and the proprietary informatica has not been veri-fied by the utility.

Information in the file shows that the test indicated in NUC-9 should be sufficient for qualification of there motors. However, a review of this test will be required. SCE&G has already identified this requirement.

Their intention to use a different lubricant requires qualification of that lubricant. Bearing life is stated as being obtainable from the vendor but is not stated in the file. Test applicability. lubrication qualification and bearing life remain items of concern.

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