ML20205N846

Proposed Tech Specs,Revising Page 3/4 8-4 Re Surveillance Testing Requirement for Diesel Generators 1DG01KA & 1DG01KB

ML20205N846
Person / Time
Site:	Braidwood
Issue date:	10/26/1988
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20205N844	List: ML20205N840 ML20205N846
References
NUDOCS 8811040375
Download: ML20205N846 (6)

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t ATTACMENT A  :

I PROPOSED CHAtlGEE TO APPENDIX A.

TECit(ICAL SPECIFICATIGIS Of. FACILITY l

OPERATING LICENSE NPF-72 >

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. .o ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

c. At least once per 31 days by checking for and removing accumulated f water from the fuel oil storage tanks;

d. By sampling new fuel oil in accordance with ASTM-04057 prior to addition to storage tanks and:

1) i;y verifying in accordance with the tests specified in ASTM-D975-81 prior to addition to the storage tanks that the sample has:

a) An API Gravity of within 0.3 degrees at 60*F, or a specific gravity of within 0.0016 at 60*F, when compared to the supplier's certificate, or an absolute ,

specific gravity at 60*F of greater than or equal to 0.83 but less than or equal to 0.89, or an API gravity of greater than or equal to 27 degrees but less than or equal to 39 degrees; b) A kinematic viscosity at 40'C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1

, centistokes, if the gravity was not determined by comparison with the supplier's certification; c) Aflashpointequal,toorgreaterthan125'F;anh 3

d) A clear and bright appearance with propce color when .

tested in accordance with ASTH-04176-82. ..

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2) By verifying within 30 days of obtaining the sample that the other

, properties specified in Table 1 of ASTM-0975-81 are met when tested in accordance with ASTM-0975-81 except that the analysis for sulfur may be performed in accordance with ASTM-D1552-79 or

ASTM-D2622 82.

e. At least once evary 31 days by obtaining a sample of fuel oil from the j

storage tank., in accordance with ASTM-D2276-78, and verifying that total particulate contamination is less than 10 mg/ liter when checked in accordance with ASTM-D2276-78, Mett.od A.

! f. At least once per 18 months," during shutdown, by: l

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1) Subjecting the diesel to an inspection in accordance with l- procedures prepared in con unction with its manufacturer's

recommendations for this c ass of standby service, l

2) Verifying the generator capability to reject a load of greater than or equal to 1034 kW while maintaining voltage at 4160 + 420 volts and frequency at 60 + 4.5 H:, (transient state 7,60+1.2Hz(stea'dystate).

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• Thespecified18monthintervalmaybeextendedtokmonthsforCycle1only.

BRAIDWOOD - UNITS 1 & 2 3/4 8-4 Q AMENDMENT NO 1

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ATTACEMNT_B l

$UMARY OF PROPOSED .CliAltGER The proposed change involves Technical Specification 4.8.1.1.2f regarding diesel generator surveillance testing. The proposed change requests that the frequency for performing certain diesel generator surveillance tests I be entended on a one-time basis for an additional 7 months from the specified 31 months to 38 months, to allow performing such tests during the refueling ,

outage of Braidwood Station Unit 1. This change has become necessary because

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the refueling date for Braidwood Station Unit I has been rescheduled from an espected date of May, 1989 to September, 1989. In changing the surveillance frequency to 38 months on a one time basis only, the completion dates for the 1DG01KA and IDG01EB Diesel Generators can be rescheduled, to October 1, 1989 and October 11, 1989, respectively.

Upon NRC approval, Braidwood Station does not intend to use any of  ;

the 25% extension permitted by Technical Specification 4.0.2 since this can  ;

result in scheduling concerns for subsequent fuel cycles.

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SAFETY EVALUATION AND ENVIRNMENTAL ASSISSM[2iT Deferral of the surveillance will not significantly increar,e the possibility of undetected degradation of the diesel generators because they are operated infrequently for short periods of time. Since the actual operation time of the diesel generator is small, the probability of a diesel generator failure due to mechanical wear is small. The Standard Technical Specification includes the phrase ..." 18 months, during shutdown ...". This wording implies that the surveillance tests had been intended to be performed during a refueling outage shutdown. Commonwealth Edison Company reviewed the failure history for the diesel generators and did not find any trends identifying abnormal failures. The limiting conditions for operation and other surveillance requirements to verify operability are unchanged and will remain in effect. The monthly and quarterly diesel generator surveillances will continoe to be performed during the surveillance interval extension, as well as the previously indicated preventive maintenance programs. As such, the margin of safety is not reduced.

This amendment involves a change in the use of the f aellities components located within the restricted areas as defined in 30 CFR 20.

Edison has determined that this amendment involves no significant increase in the amounts, and no significant change in the types, of any effluents that may be released offsite and that there is no significant increase in individual or cumulative occupational radiation exposure.

Accordingly, this amendment meets the eligibility criterla for categorical exclusion set forth in 10 CFR 51.22(c)(9). Pursuant to 10 CFR 51.22(b) no environmental impact statement or environmental assessment need be prepared in connection with the issuance of this snendment.

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EVALUATIQi OF SIQf!FICANT HAZARDS CCtfSIDERATIGfs  ;

i Commonwealth Edison has evaluated this proposed amendment and  !

determined that it involves no significant hasards considerations. According  !

to 10 CFR 50.92(c), a proposed amendment to an operating license involves no f significant hasards considerations if operation of the facility in accordance j with the proposed amendment would nott }

1) Involve a significant increase in the probability or consequences  !

of an accident previously evaluated; or j i

2) Create the possibility of a new or different kind of accident from [

any accident previously evaluated; or l

3) Involve a significant reduction in a margin of safety. l t

This proposed unendment involves the frequency of surveillance  !

tests to prove diesel generator availability. Previously evaluated I accidents which involve a loss of offsite power are the only accidents which  !

depend on diesel generatet availability. The probability of & loss of  !

offsite power accident and the probability of other accidente concurrent  !

with a loss of offsite power are not affected by this diesel generator k surveillance frequency. l I

The consequences of previously evaluated accidents would not be [

significantly increased because the diesel generator availability would not I be significantly decreased. Equipment problems identified during the diesel i 9enerator teardown inspections are primarily wear related. Because the I operation time of the diesel generators is small, these kinds of failures have a small probability of occuring. This information provides confidence I that the diesels will be capable of performing their intended function, [

resulting in no significant increase la the consequences of an accident I previously evaluated. f I

The change does not add or modify any esisting equipment, nor [

latroduce a new mode of plant operation. The operability of the diesel l generators will continue to be verlfled by performing the other related L l Technical Specification required surveillances, which remain unchanged. As l l'

such, the possibility of a new or different kind of accident from any  ;

accident previously evaluated is not created, t i

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The proposed change has been discussed with the diesel generator manufacturer and he finds the change to be acceptable. Deferral of the surveillance will not significantly increase the possibility of undetected degradation of the diesel generators because they are operated infrequently, for short periods of time. Since the actual operation time of the diesel generator is small, the probability of a diesel generator failure due to nachanical wear is small. The failure history los the diesel generator have been reviewed and no trends identifying abnormal f ailures have been found.

The limiting conditions for operation and other surveillance requirements to verify operability are unchanged and will remain in effect. The monthly and quarterly diesel generator surveillances will continue to be performed during the surveillance interval estension, as well as the previously indicated preventive maintenance programs. As such, the margin of safety is not reduced.

Therefore, based upon the above analysis, Connonwealth Edison concludes that the proposed amendment to the Technical Specification does not involve significant hasards considerations.

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