ML20085D532
| ML20085D532 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 02/25/1972 |
| From: | Utley E CAROLINA POWER & LIGHT CO. |
| To: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20085D535 | List: |
| References | |
| NUDOCS 8307250758 | |
| Download: ML20085D532 (3) | |
Text
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Carolina Power & Light Company,;t
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February 25, 1972 A
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.50-261 Dr. Peter A. Morris, Director Division of Reactor Licensing r.
Atomic Energy Commin ion Washington, D. C.
20545 r.
II. B. ROBINSON UNIT NO. 2 LICENSE DPR-23 "2A" DIESEL. FAILURE TO START IN TEST
Dear Dr. Morris:
In accordance with paragraph 6.6.1.c, Technical Specifications, it is reported that on February 13, 1972, "2A" emergency dicsc1 generator
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failed to start on inmtine test.
The diesel tripped immediately after a remote manual cr.,1. ems initiated because of a momentary indication of w
high crankcaso pren nc.
The alarm was reset and the diesel started and operated successfully for 30 minutes. This abnormal occurrence uns re-ported to AEC Compliance, Region II, by telephonc 'and confiried by telc-graph on February 14, 1972.
To increase the reliability of the dicsc1 generator system "o provide power in an emergency, the following dicsci trip signals have been bypassed by a k2y switch for cach engine.
1.
Low lube oil pressure s _.r.
2.
Lamalant pressure 3.
Iligh coolant temperature f
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4.
Iligh crankcase pressure I
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I 5.
Start failure trip of fuel racks In the normal standby condicion, the above engine p
trips will be bypassed; however, the alarm signals f
will be actuated.
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8307250758 720225 i
PDR ADOCK 05000261 8
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Dr. Peter A. Morris February 25, 1972 The following diesel generator trip functions remain unchanged:
1.
Generator over current 2.
Mechanical overspeed 3.
Manual trip of engine fuel racks 4.
Ten second solenoid action to stop starting air The above modifications to the engine trip signals were effected on February 15, 1972. This action has been reviewed and concurred by the Corapany Nuclear Safety Committee.
Yours ucry truly, h '6 2[+ d i.b
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E. E. Utley Manager Bulk Power Supply NBB:me cc:
Mr. C. D. Barham Mr. G. P. Beatty Mr. N. B. Dessac O
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DI VI U10H OF COU.I'1,1 At;CE
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R. T. Car 1 con Perion 1 X
H. B. ROBDISON NO. 2 - REPORT TO DRL, DATED E. f:. Howard FEBRUARY 25, 1972
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E. J. Brunner Enclosed for your information is a copy of Ecrion I X
the subject report concerning the failure F. J. Long of a diesel to start during a test. This k'.
C. Seidle
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licensee has experienced a si nificant number Fcrion T1 B
of similar diesel starting failures since Region TT initial operation. Of special interest is H. C. Ibneley the modification that was made by the licensee Recion TT X
that should improve the reliability of the G. Fiore111 diesel generators. As a result of this modi-Ecrion ITT X
fication, the licensee vill routinely operate
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with selected trip si6nals bypassed and then D. M. Hunnicutt
.Henion 1IT X
energize them during test periods.
k'. F. Vetter gfi on TTI
Enclosure:
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Flora As Stated
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Deaton TV X
l G. W. Spencer cc:
W. C. Seidle, CO:II
%enion V X
FM:
D. G. Keppler DATE: 3/13/Ti b
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