ML20237K229

Proposed Tech Spec,Extending,On one-time basis,18-month Surveillance Testing Requirement for Diesel Generator for Addl 13 Months Until First Refueling Outage

ML20237K229
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	08/07/1987
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20237K223	List: ML20237K220 ML20237K229
References
NUDOCS 8708190148
Download: ML20237K229 (6)

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l ATTACHMENT A l

PROPOSED CHANGES TO APPENDIX A, IECHNICAL SPECIFICATIONS OF FACILITY OPl! RATING LICENSES NPF-66, and NPF-72 l

Revised Page: 3/4 8-4 3427K i

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PDR ADOCK 05000455 P PDR

ELECTRICAL POWER SYSTEME SURVEILLANCE RE0VIREMENTS (Continued)

c. At least once per 31 days by checking for and removing accumulated ,

water from the fuel oil storage tanks; J

d. By sampling new fuel oil in accordance with ASTM-D4057 prior to l addition te storage tanks and:

1) By 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 1 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 I

centistokes, if the gravity was not determined by comparison with the supplier's certification; c) A flash point equal to or greater than 125 F; and j d) A clear and bright appearance with proper color when tested in accordance with ASTM-D4176-82.

2) By verifying within 30 days of obtaining the sample that the other properties specified in Table 1 of ASTM-D975-81 are met when i 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 every 31 days by obtaining a sample of fuel oil from the 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-D227 - Method A.

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f. At least once per 18 mo ths, uring shutdown., by:

1) Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service,

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 1 4.5 Hz, (transient tate)' 60 + 1.2 Hz (steady state) m-The spe.cated 1% mm +h in+ce val ruy be- toa m J -fo r c y c le. i, p ro v l cl e d 4he 6 u. r v d ll a y1c e is perfomed BYRON - UNITS 1 & 2 3/4 8-4 d ur i p3 +-h e- 4ie s t rc 4a el ig o u.4 qc. .

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ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

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

d. .By sampling new fuel oil in accordance with A5TM-D4057 prior to.

addition to storage tanks and:

L 1) By 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 grav'./ 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) A flash point equal to or greater than 125*F; and d) A clear and bright appearance with proper color when tested in accordance with ASTM-D4176-82.

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-D975-81 except that the analysis l for sulfur may be performed in accordance with ASTM-D1552-79 or l ASTM-D2622-82.

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! e. At least once every'31 days by obtaining a sample of fuel oil from the storage tank, in accordance with ASTM-D2276-78, and verifying that total i particulate contamination is less than 10 mg/ liter when checked in l accordance with ASTM-D227 Method A.

f. Atleastonceper18mothsYdringshutdown,by:

1). Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service,

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 1 4.5 Hz, (transient state}, 60 1 1.2 Hz (steady state).

W T h' 5pec ie. m o M h 's ^ + e r v a l may be w a.lue -f e r '

c y c l e. I, P rou M e.d + he S a r ved L l a nc e- {s pu -Goim e d d umi rv +he 4rr3+ refue1 % oa4a3e, BR -

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1 ATTACHMENT B

SUMMARY

OF PROPOSED CHANGES The proposed change involves Technical specification 4.8.1.1.2f regarding diesel generator surveillance testing. The proposed change requests that the frequency for pcrforming certain diesel generator surveillance tests be extended on a one-time basis an additional 13 months l from the specified 18 months to allow performing such tests during the I refueling outages of Byron Station Unit 2 and Braidwood Station Unit 1. The

( Technical Specification includes the phrase ..." 18 months, during shutdown ,

This wording implies that the surveillance tests had been intended to )

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be performed during a refueling outage shutdown. The refueling outage for Byron Unit 2 is scheduled for January, 1989. The refueling outage for Braidwood Unit 1 is scheduled for May, 1989. Upon NRC approval, Byron and Braidwood Stations do not intend to use any of the 25% extension permitted by Technical Specification 4.0.2 since this can result in scheduling l concerns for subsequent fuel cycles.

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ATTACHMENT C

! EVALUATION OF SIGNIFICANT HAZARDS CONSIDERATIONS Commonwealth Edison has evaluated this prooosed amendment and determined that it involves no significant hazards considerations.

l According to 10 CFR 50.92(c), a proposed. amendment to an operating license i involves no significant hazards considerations if operation of the facility in accordance with the proposed amendment would not:

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

! of an accident previously evaluated; or

[ 2) Create the possibility of a new or different kind of accident from I any accident previously evaluated; or

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

This proposed amendment invc1ves the frequency of surveillance I tests to prove diesel generator availability. Previously evaluated

! accidents which involve a loss of offsite power are the only accidents which depend on diesel generator availability. The probability of a loss of offsite power accident and the probability of other accidents concurrent with a loss of offsite power are not affected by this diesel generator l

surveillance frequency.

The consequences of previously evaluated accidents would not be significantly increased because the diesel generator availability would not be significantly decreased. The previously established preventive maintenance programs at each station are sufficient to detect up to 95% of the potential failure modes that would be detectable during the performance of the deferred surveillance. The remaining 5% of the potential failure modes are mostly related to a mechanical wear type of failure. Because the operation time of the diesel generators is small, these kinds of failures have a small probability of occuring. This information provides confidence that the diesels will be capable of performing their intended function, resulting in no significant increas'c in the consequences of an accident previously evaluated.

The change does not add or modify any existing equipment, nor introduce a new mode of plant operation. The operability of the diesel generators will continue to be verified by performing the other related Technical Specification required surveillance, which remain unchanged. As such, the possibility of a new or different kind of accident from any accident previously evaluated is not created.

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 mechanical wear is small. The failure history for the diesel generator have ,

been reviewed and no trends identifying abnormal failures have been found. l 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 surveillance will continue to be performed ,

during the surveillance interval extension, as well as the previously I indicated preventive maintenance programs. As such, the margin of safety is )

not reduced.

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

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