ML20003D537

LER 81-007/03L-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: ML20003D528 ML20003D537
References
LER-81-007-03L, LER-81-7-3L, NUDOCS 8103270626
Download: ML20003D537 (1)

Text

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

LICENSEE EVENT REPORT O NTROL 8 LOCK: l l l l \ l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI 1 6 lo l i 8l 9l Ml A]

7 P l P l S l 114 l@l UCENSEE COOE 15 0 l 0 l - l 0 uCENSE l 0 l Nt.,

0 l Metr 0 l 01 - l 0 l O 25 l@l 26 4 !UCENSE I l 11TYPE 1l 1l@l 40 l

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CON'T lO11I "'N"CE OuA lL @l0 l 5 l OOCKET0 l- l0 l 2 l 9 I 368@l690 l 2EVlENT 117 l 8 l 174 l@l 0 l 3l 75 11CATE 91 81 301l@.

7 8 60 61 NUMBER OATE REPORT 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  !

1 iOl3l l Sampling System (C-19) was declared inocerable. Instrument & Control personnel were i 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. l 10181 l 80 l

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_ SEQUENTIAL OCCURRENCE REPORT REVISION LE R/RO EVENT YEAR R EPORT NO. COOE TYPE NO.

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._21 22 23 24 26 27 28 29 30 31 32 N AC 0 0 P T ME HOURS S8 i POR 8. SLP E MANUPACTURER lxl@lxi@ l21@

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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. l 7 8 9 30 STA  % POWER OT14ER STATUS Dis O RY OISCOVERY OE!CRIPTION i j i 15 l l E l@ l0 l 7 l 4 l@] N.A. l l A l@l Operational Event l I

A TIVITY CO TENT RELEASEO OFREt. EASE LOCATION OF RELEASE @

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7 8.9 to 11 44 PERSONNEL EXPOSURES NUM8ER CESCRIPTTON I i I 7 I I O I O I O l@l-TYPE l @l N.A. l

,ERSONNELiu;ULS NumeER li t a l 1010101@OESCRiptiON@ l u I 7 8 9 11 12 -

80 LOSS OF OR CAMAGE To FACluTY TYPE CESCRIPTION l

L1_LJ l Z l@l10 N.A. l 7 8 9 80 ESCRIPTION e ISSUE 12lollNf@l N.A. l lllIllllll lfl}

' 8'10 8'$ 7 0 6 2 6 Mr. M. Thomas McLoughlin 17-746-7900  !

' NAME OF PREPARER PHONE: S,

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