ML20024B442

Recommends That Reactor Coolant Pump Motor Stator Temp Setpoint Be Kept Down to 145 C to Permit Corrective Action Following Alarm Before Max Allowable Temp Reached,In Response to Licensee Request to Change Setpoint

ML20024B442
Person / Time
Site:	Three Mile Island
Issue date:	07/19/1974
From:	Rogers L BABCOCK & WILCOX CO.
To:	Geoffrey Miller GENERAL PUBLIC UTILITIES CORP.
References
TASK-*, TASK-GB GPU-2516, SOM-258, NUDOCS 8307080739
Download: ML20024B442 (2)

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Middletown, PA 17057 Resctor Coolant Hotor stator Te=perature Cetroint i Eubjects  !

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est Mr. Hillers i i

Following is in response to Met. Ed. request for change in the setpotst . .-

for Reactor Coolant Pu=p Motor statar ta=perature. ..

Pe NIMA n; proved limit of the observable temperature as nessured tr f' an haidad detector (RT:2) for Class P insulation is motors of the size ,.  :

ar.1 voltage range of the RCP :nters is 150*C. Paces on :TatA and the A-C  : !* I

".sstruction r.an:ni, it is permisssble to raf e the stator temperature , F- '

alsr:a set point to the naximum of 150*C. novever, it is recor= ended that .

the setpoint be kept down to 145*C, S' below the ruir:un allovable .

tesperature, to permit corrective a tics following an alars before the . .

-nf e. allovable temperature is reschei. n

,$ . I If 1%5'c slars setpoint still becoces a nuisance,150*C setpoint veuld , g necessarily be required

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.' 6 If you have any questions, plesse contact me. ,

7ery truly yours, e .

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Site Operations Engineer .

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l RC? Meters , stator Temperature set . Point

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- The following is ih response to your phone call of July la, l

1974

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1 The NDu approved limit of the observable temperature as j

,! measured by an embedded detector (RID) for Class F insulation

'r l in notors of the size and voltage range of the ACP notorsisis '

. 150'C. Based onN . DG and the A-C instruction casual. it t permissable to raise the stator temperature alara set point >is h recossended that t e

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to the nazinun of 150*C.down to 145'C, S' below the maximum allew. ,

set point be kept j

l able tenperature, to pernit corrective action fo11cving aa 5 alara before the nazinua allowable te=perature is reached.

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