05000293/LER-1981-007-03, /03L-0:on 810217,reactor Coolant Leak Detection Air Sampling Sys Declared Inoperable.Caused by Blown Fuses. Fuses Replaced.Pump Will Be Rebuilt

/03L-0:on 810217,reactor Coolant Leak Detection Air Sampling Sys Declared Inoperable.Caused by Blown Fuses. Fuses Replaced.Pump Will Be Rebuilt

ML20003D537
Person / Time
Site:	Pilgrim
Issue date:	03/19/1981
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003D529	List: 05000293/LER-1981-007, Forwards LER 81-007/03L-0 05000293/LER-1981-007-03, /03L-0:on 810217,reactor Coolant Leak Detection Air Sampling Sys Declared Inoperable.Caused by Blown Fuses. Fuses Replaced.Pump Will Be Rebuilt
References
LER-81-007-03L, LER-81-7-3L, NUDOCS 8103270626
Download: ML20003D537 (1)

LER-1981-007, /03L-0:on 810217,reactor Coolant Leak Detection Air Sampling Sys Declared Inoperable.Caused by Blown Fuses. Fuses Replaced.Pump Will Be Rebuilt

Event date:
Report date:
2931981007R03 - NRC Website

text

NRC FO"M 366 U. S. NUCLEAR REGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT O

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8 60 61 OOCKET NUMBER 68 69 EV ENT OATE 74 75 REPORT CATE 30 EVENT OESCRIPTION ANO PROS ABLE CONSEOUENCES h t o 12 I l On Feb. 17, 1981 at approximatelv 1450 hrs. the Reactor Coolant Leak Detection Air iOl3l l Sampling System (C-19) was declared inocerable.

Instrument & Control personnel were i 1

10 t 4 l l immediatelv dispatched to invest 12 ate and recair the uni t.

Durine thi s evene rho dd-1 O l s i I well sump pumps were operable.

Blown fuses which were the im:::ediate cause of this I

i O g e i l failure were replaced and C-19 returned to service at approximatelv 1516 hrs. the satpe Ici7i l day. The unit has operated satisfactorily since that time.

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33 34 35 36 37 43 41 42 43 44 47 CAUSE OESCRIPTION ANO CORRECTIVE ACTIONS l i 101 I The immediate cause of this failure was blown fusos.

Thoso vero roninced.

An in-I pm l vestigation has determined that the pump bearings are deterioratina creating drae on 1

,,, fi l the pump 's mo tor.

The motor is however running at rated current.

Instantaneous I

,,3i l overload does occasionally cause the power supply fuses to blow.

PNPS is awaiting i

iii4i l delivery of parts to rebuild the pump.

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7 8 9 11 12 80 LOSS OF OR CAMAGE To FACluTY TYPE CESCRIPTION L1_LJ l Z l@l N.A.

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