ML20009C347

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Forwards Completed Reliability Study Questionnaire Items Q.6,7 & X.1 Re Exciter Regulator Temp & Accumulated Time Load Data.Wv Childs Is Responsible for Completion of Questionnaire
ML20009C347
Person / Time
Site: FitzPatrick Constellation icon.png
Issue date: 03/02/1978
From: Leonard J
POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To: Goller K
Office of Nuclear Reactor Regulation
Shared Package
ML20009C340 List:
References
JAFP-78-108, NUDOCS 8107200479
Download: ML20009C347 (4)


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  • v'o-POWER AUTHORITY OF THE ST ATE C - * .

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w. - -y p o, gox 4g d JOHN Q. LECNARD, JR.

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. vo,= 33 ass 3n 4 484o March 2, 1978 JAFP 78-108 . ..

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.e Director of Nuclear Reactor Regulation . ? <-

United States Nuclear Regulato'y Commission Washington D. C. 20555 @5

6 Attention: Karl R. Goller ih Assistant Director for Operating Reactors ' $i Division of Operating Reactors .y

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Subject:

James A. FitzPatrick Nuclear Power Plant MJ Questionnaire for Nuclear Regulatory Commission h Reliability Study of Standby Diesel Generator Units 'g Cocket No. 50-333 7

Reference:

John D. Leonard, Jr. to Karl R. Goller Letter 78-35 of January 20, 1978 ,$

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Dear Mr. Goller:

y The Power Authority has completed and enclosed the Reliability Study questionnaire items Q. 6, 7 and X.1 concerning Exciter / h I

Regulator Temperatures and Accumulated Time-Load Data. ".h

.y J st-y As before, the individual at the James A. Fi:: Patrick Nuclear Power Plant site responsible for comletion of the questionnaire {@i is Mr. W. Verne Childs, Assistant to the Operations Superintendent. yd

.yk We trust that this information satisfies the concerns of 'y

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the Commission regarding the subj ect matter. _J

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Very truly yours , -iG

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Enclosure ' RESIDENT MANAGER f'J; .

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X. 1. Give the accumulated time-load operating record for each diesel-generator unit from installation to the present

- (: tunning Hours): See Comments, Item X.

E c 1 'j Preoperational test Date July 29, 1974

Engine  : Sury. Testing & : Emergency  : Total  :
Serial No. : Maintenance Hrs. : and Other  : Hours  :
: No load Loaded : Service Hrs. -  :

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100%

2. Surveillance test load (percent of continuous rating)
3. Give the projected or clanned time-load operation for each diesel-generator unit during the next 12 months.
Surveillance &  : Emergency : Total  :  :
Maintenance Hrs. : and other : Hours  :  :
: Service Hrs. -  :  :
12 hrs @ 100%
None  : 14  :  :

." 2 hrs 9 _

3 0,. . . .

4. Provide the following summary of the periodic surveillance testing experience:
a. Starting date of surveillance testing (CL date) 10/17/74
b. Periodic test interval Various - See 4 (e) below.
c. Total numoer of surveillance tests cerforced 30 reach encine).
d. Total number of test failures 6 (All engines comoined) 2 failure to accept load 1 failure to start failure to carry loac 1 f ailures due to coerator error 2 failure due to equi.orent not being operative during emergency condi tions None
e. Supply a ccpy of the surveillance test arccecures with this concleted cuestionnaf re.

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Additional Ccaments See Attached Sheet 4

Y. Seneral Suggestions Briefly give constructive criticism or suggestions as to improvement in reliability of the diesel generators. These remarks may cover tests, maintenance, cractices, orders, policy, adjustments, etc.

Attached as Enclosure 2 is a copy of the " Supporting Information" that was suFmitted to the Nuclear Regulatorf Commission as part of a proposed technical specification change relating to the Emergency / Diesel Generator Systems at JAFNPP.

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It has been concluded that the operational availability of the a-c power supply to the emergency buses is decreased by present operating procedures, in that the offsite power source is intentionally disconnected from the emergency bus to allow " loading of the emergency diesel generators."

. We believe that the requirement to run the " operable" emergency diesel generators continuously is an unrealistic one and is not consistent with

- Technical Specifications for present-day plants; furthermore, the increased running time on the emergency diesel generators can create unnecessarily severe maintenance requirements on these. units, which should be avoided if possible. In addition, the proposed connection on .

the " degraded" emergency bus to the reserve station service power system enhances the availability of the sta: ion service power supply to the emergency bus by eliminating the possibility of a failure to make a fast or residual transfer to the offsite power statien in the event of a unit trip.

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