ML19289F148

LER 78-043/03L-0 on 781019:snubber 23HBS-38 Found W/Unacceptable Bleed Rates & Locking Velocities.Caused by Clogged Bleed Orifices & Low Ambient Temp During Tests. Safety-related Snubbers Tested,Repaired & Recalib

ML19289F148
Person / Time
Site:	Peach Bottom
Issue date:	11/17/1978
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19289F139	List: ML19289F138 ML19289F148
References
LER-78-043-03L, LER-78-43-3L, NUDOCS 7906040329
Download: ML19289F148 (1)

Text

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• f port No. 2-78 43/3L-0

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Unit 2 LICENSEE EVENT REPORT CONTROL DLOCK: l l l l l l l (PLEAsE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 0

1 8 9 lP l A l P IB lS l 2 l@l 0l0 l- l0 LICENSE LICENSEE CODE 14 15 l0 l0NUMSER l0 l0 l0 l 0l Ol@l 4 l 1l 25 26 1 l 1l 1l@l57 CATSd LICENSE TYPE JO l l@

CON'T 0

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8 SO ACE l60 L @l0 l 5 l0 61 l- l0 l217 17 OOCKET NUM8ER 68

@l11011191718 69 EVENT DATE 74 hl1 11 I l 1717 9!@.

?S REPORT O ATE 80 EVENT DESCRIPTION ANO PROSA8LE CONSEQUENCES h o 2 [Durina a refuelina outage, snubber 23HBS-38 on the HPCI turbine exhaust I g lline was found wi th an empty reservoir (Tech.Soec.4.11.D.1). It was func-o 4 Itionally tested and failed to meet minimum bleed rate criteria.Durinq l o s Ifunctional testing per Tech. Spec.4.11.0.4 snubbers were found with un- _

l o s la cceptable locking velocities and bleed rates. Manufacturer indi cates I o 7 flocking velocities increase with temp.Thus snubbers with low velocities 1 0 a lprobably would have operated properly at higher normal coeratino temos. ]

7  : o 80 E COE SUSC E COMPONENT COOE SUSCODE S E O 9 lz I z l@ Lg_.j@ 18 l@ IS I ul 9101 a l T l@ W@ W @

7 8 9 10 11 12 13 18 19 23

,,, SEQUENTI AL OCCURRENCE REPORT REVISloN LER/PO EVENT YE AR REPORT NO. COOE TYPE N O.

@ REjERT l7 l8 l l-l l0 14 13 l l/l 10 3l lL l l-l l 0l

_. 21 22 23 24 26 27 28 29 30 31 32 TA EN AC ON ON PL NT M T HOURS S S ITT FOR h. SUPPLIE MANUFACTURER Ld@Ld@ Ld@

3J 34 35 LI_J@

36 In I ol ol n 37 LtJ@

43 Ld@ Ld@ cIo cIs!@

40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O l Snubbers-Grinnel Models AH 1372 ASC,AH 1373 A,and AH 1423 A -unacceot- I

, i l able bleed rates were- caused by clocaino of snub,ber bleed ori fi ces. Un- I i 2 I acceptable low locking velocities during testing were caused by low am- l

, 3 [ bient temperatures during functional testing.All safety-related snubbers

, ,, gwere tested, repaired as necessary, and recalibrated. I 7 8 9 80

~ STA S  % POWER oTH E R STATUS DISCO RY OtSCOVERY OESCRIPTION i s H l@ l0 l 0l0 lhl NA l lBl@l Surveillance Test l ACTIVITY CO TENT RELEASEn OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 7

i s 8 9 lZl@ zl@l to 11 NA 44 l l 45 NA 80 l

PERSONNEL EXPOSURES NUMB E R TYPE DESCRIPTION i 7 l 0 l 0 l 0 l@l Z l@l NA l

' ' ' ,ERSONd'imu'4ES *

~uM8ER DESCR,,TiONe 22 % 095 i a l0 0 0l@l12 NA l r 8 9 it 80 LOSS OF OR OAMAGE TO FACILITY T PE C E SC R '"'

• 7 8 9 10 N 7906040327 Sl 80 PU8(ICITY NRC USE ONLY ISSUED DESCRtPTION

• 2 O lNlhl NA , -

U% l i lilllllll 1lII 7 8 9 10

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M/ J. Cooney I

/ 68 69 80 3 o

. . , . . e e r r - e - , , , ,, ,,, (215) 841-5020