ML19326B947

Reviews Basis for Deletion of Generator Separation Test at 100% Power During Power Escalation Test Program. Deletion Unacceptable

ML19326B947
Person / Time
Site:	Arkansas Nuclear
Issue date:	02/21/1975
From:	Goller K Office of Nuclear Reactor Regulation
To:	Phillips J ARKANSAS POWER & LIGHT CO.
References
NUDOCS 8004180657
Download: ML19326B947 (2)

Text

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NRC PDR Local PDR KRGoller

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Docket No. 50-313 ORB #2 Reading RMDiggs

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f Arknanas Power and Light Company DLZiemann

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ATTN: lir. J. D. Phillips ACn (l&J t_h,CE (

Senior Vice President

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Production, Transcission and Engineering r.'

Sixth and Pine Streets

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Pine Bluff, Arkansas 71601 9

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Gentlenen:

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3 k*e have reviewed the infornation you submitted concerning deletion of the generator separation tcat at 100 perennt power during the F

power escalation test progran for the Arkanscs Nuclear One - Unit 1 F

(ANO-1) plant, Facility License No. DPR-51.

Tbc matter was discussed on several occasions with representreives of Arkansas Power and

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Light Company (AP&L).

Your bases for deletion of the generator rieparation test was subnitted by your letter dated Jtnuary 6, 1975, and supplenented on January 14, 1975, by a report of an unplanned generator trip from full power. Your juctification for the deletion of this test fron your powcr escalation test progran was that the generator separation test would give ninilar reaults for the transient on the unit as experienced during the turbine trip test already perforced. You also indicated that no r.cv data vould be obtained by performing this test.

Oased upon our review of your juctifiestion for deletion of the rencrator separation test, we have concluded that the results of the turbine trip test did not satisfy the test objectives for the t

rencrator trip (ccparction) test as given in Regulatory Guide 1.6G

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cr en earlier guide, " Guide for the Pinnning of Initial Startup r

h Prograna". The objectives of the generator trip test crc o assure that the turbine rencrator vill not c):cced its decipn speed and to

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cntablish that the pinnt's electrieni systen vill perfern as

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desiened Cer this transient test during uhich the cicctrical systen

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nay be nuhjected to frecuencies in crcess of 60E's. To ceconplich h

these test objectiven, you should accure thr.t the rencrator is 6

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disconnected from the transmission system in a manner that will result in plant conditions consistent with the assumptions used to.

calculate the noximum overspeed vslue for the generator. Such tlll.

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plant conditions can normally be simulated by opening the generator output breder in a manner that will require a turbine generator s?E -

overspeed condition to initiate closure of the steam admission or stop valves. The inadvertent generator trips that have been

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experienced at AMO-1 recently were initiated in a manner that

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resulted in automatic simultaneous renerator separation from the transnission ' system and closure of the steam stop valves. For such

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cases, the turbine generator would not be expected to increase in

~.;;E speed and the objectives of, tbc generator trip test, as stated above, would not be satisfied.

Section 13 of the pinal Safety Analysis Report provides for the performance of generator trip test at 100 percent power. Our EE p.,

acceptance of the test program was based, in part, on this test.

Based on our revicu as discussed chove, ve have concluded that p

your justification for deletion of the generator trip test is unacceptable, and therefore, the generator trip test should be i

performed at 100 percent power and in a manner which satisfies R

the test objcetives stated above.

Sincerely,

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bEtFr.. co11er, Assiccant nirector

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for Operating Reactors Division of Reactor Licensing ec:

!!orace Jewell Eouse, Holts & Jevell 1550 '"cuer Budidinr, f

Little Rock, firFcnses 72201 I

Mr. *lillicn Cavanaur,h, III Production Departrent Post Office Bon 551 Little 2cch, Arkanacs 72203 Arkanscs Polytechnic College d

Euasellville, Arkansas 72301 o,,,a,

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