05000029/LER-1977-033-03, /03L-0:on 770620,discovered That Five of Eight Thermocouple Locations on Boron Injection Flow Path Were Less than 150 F.Caused by Leakage from Purification Sys Through Three Valves to SI Tank.Valves Repaired

/03L-0:on 770620,discovered That Five of Eight Thermocouple Locations on Boron Injection Flow Path Were Less than 150 F.Caused by Leakage from Purification Sys Through Three Valves to SI Tank.Valves Repaired

ML20148J545
Person / Time
Site:	Yankee Rowe
Issue date:	07/20/1977
From:	Recasha Mitchell YANKEE ATOMIC ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20148J542	List: 05000029/LER-1977-033, Forwards LER 77-033/03L-0 05000029/LER-1977-033-03, /03L-0:on 770620,discovered That Five of Eight Thermocouple Locations on Boron Injection Flow Path Were Less than 150 F.Caused by Leakage from Purification Sys Through Three Valves to SI Tank.Valves Repaired
References
LER-77-033-03L, LER-77-33-3L, NUDOCS 8011240426
Download: ML20148J545 (1)

LER-1977-033, /03L-0:on 770620,discovered That Five of Eight Thermocouple Locations on Boron Injection Flow Path Were Less than 150 F.Caused by Leakage from Purification Sys Through Three Valves to SI Tank.Valves Repaired

Event date:
Report date:
0291977033R03 - NRC Website

text

101! Ik216i '71 (Pttaak. niNT not. nreUinco i :re CONTROL G;C0K:

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LICENSE EVENT v

LCthS:E N AY.E LCENSE NUMDEn TYPE TYPE l ul Ajy jg ln l1 !

l 0 l 0 l-l0 l0 l0 l0 l 0 l-l0 l0 l l4l1 l1 l1 l l0l3l 8

25 26 30 31 32 7 60 14 15 T(([ c$$

DOCKET NUMeEn EVENT DATE ACPORT DATE CATEGOav 01co:rTl l

l lLl lL l l o l S I 01--l 010l2 ld l o I 6 l 2 l 0 l 7 l 71 l0 l 7 l 210 l 7 ]

7 8 57 53 53 60 G1 68 69 74 75 Ss T DESCR:PTE ([. d(

~7 7 - 3' E

.y

@len refmlire. n Chrmical Shutdwn System Onorability Check was rierfomed.

It was 5:

7 e9 [cg l discovered that 5 of the 8 thermocounle locations on the boron iniection flow path were:

5; 7 eS D GGrG!.

o: !.lessthan150!F.

This is a repetative occurrence.

Redundant systems were not EQ 7 89

{cpj [arailable.

Purification header pressure was reduced and line temperature began slo..1v (

6; l

7 8S

@ lheatinc uo.

- ELF.R64 '^ ~' '

6L 7 89 pave j

SYSTEM

CAUSE

COMPONE NT COMPONENT CODE CCCE COMPONfNT CODE SUPPUU1 MANUFACTUACR VIOLATION ICTil IP I C l IF l IVlAILIVIElXl lA l lP l0 l3 l2 l lN l l

7 89 10 11 12 17 43 44 47 48

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l CAUSE DESCR:PT'3N 3

x

- caused by back leakage from the purification system thru thyee valves l

@ Iri l

7 s9 a;;

I

$ Ito the S.I, tank. Tic [eakate was of sufficient macnitude to exceed era capacity of j

(1@ lthe heat trace system. Valves were repaired and system e returned to service.

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~ 89 7

MElHOD OF I

F AC:LfTY STATL5

% F O'.'.'E R OTHER STAlVS OCCOVER

O!SCOVERY DESCA:PilON 11 lHl (0l0l0) l NA l

lb l l

NA 1

I 7 8 9

10 12 13 44 45 46 E:)

FOAM OF

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ACTMTY C C A TE'.'T AMOUNT OF ACTMTY LOCATON OF AELEASE OF FELE ASE l NA l

l NA l

FELEA!!O lZl [Z._j 7 8 9

10 11 44 45 0;

PERSONNEL EXPCSURES NUYc " A TYFE CESCAIDTION 13 l0 l 0l 0l l

NA 7 89 11 12 13 EC PERSCNNEL INJUR ES NUMBER CES:A =TCN i

1' l0 l 0l 0]

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':A 7 89 11 12 6;

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OFFSITE CONSECUENCES 1.

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7 89 LOSS OR DA!/. AGE TO FACluTY i

TYPE CESCRDTC*d i

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7 89 10 Sq j

PUCUCITY

@ l NA E'

7 89 80 D24,0 26 ADDITIONAL FACTCES hI NA J

bl 7 89 l $ 7'7.? f l

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obert M. Mitchen 413-625-6140 1

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