ML19319D988

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RO-76-18:on 761228,util Was Informed That Westinghouse Model 59PH Pressure Transmitter May Fail High When Subjected to LOCA Environs.Emergency Procedure for Decay Heat Removal Isolation Valve Revised
ML19319D988
Person / Time
Site: Rancho Seco
Issue date: 01/06/1977
From: Colombo R, Eisenhuth F
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML19319D984 List:
References
NUDOCS 8003270699
Download: ML19319D988 (1)


Text

n LICENSEE EVENT REPORT

(

)

' CONTROL BLOCK:s l

l l

l l

l (PLEASE PRINT ALL REQUIRED INFORMATION) 1 6

NAME LICENSE NUMBEA E

TYPE lC l Al Rl Sl Sl1 l l0l0l-l0l0l0l0l0l-l0l0l l 4l 1l 1l 1l 1l l 0l1 l 1

7 09 14 15 25 26 30 31 32 b

CATEGORY TP DOCKET NUMBER EVENT DATE REPOAT DATE 01 CON'T [ P l 0 ]

l Pl lL l l0 l 5 l 0 l-l 0 l 3l 1l2 l l1 l 2 l 2 l 8 l 7l 6l l 0l 1l 0 l 6 l 7 l 7 l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCR:PTION 33 l The NSSS vendor (B&W) informed SMUD that a Westinghouse Model 59PH pressure trans-l 7 09 80.

Ql mitter may fail high when subjected to a post-LOCA environment.

This type lN 7 89 80 El l transmitter is used on the DHR isolation valve interlock. An Emergency Procedure l

7 89 80

@l was revised to include bypassing the interlock if the transmitter fails.

(R0 76-18) l [

7 89 80 90 1 1

7 89 pn,ug 80,

EE CODE CCMPONENT CODE M

FACT R

VOLATON M l ClF l W l Tl Nl SlT lR lUl lNl l Wl 1l 2l 0l lN l 7 89 10

.1 12 17 43 44 47 48 g

CAUSE DESCRIPTION N

DE l Uithin seven days following a LOCA the DHR isolation valves must be opened to permit' l 7 89 80 ~

gg j recirculation flow through the reactor core, preventing boron precipitation.

If the l 7 89 80

[] l transmitter fails above 255 psig, the valve will not open.

l'.

FACluTY METHOD OF STATUS

% POWER OTHER STATUS DISCOVEAY OfSCOVERY DESCAtPTION lE l l 1l 0l0 l l NA l

lDl l NA l

1 7 8 9

10 12 13 44 45 46 80 ACTIVITY CONTENT

]

NA l

l NA

~ !'

REll'ASE D OF AELEASE l AMOUNT OF ACTIVITY LOCATON OF AELEASE.

]l lZ l l

7 8 9

10 11 44 45 80 -

PERSONNEL EXPOSURES NUMDfR TYPE DESCA!PTON gg l0l0l0l ]

l NA l

7 89 11 12 13 80.

PERSONNEL INJUR;ES NUMBER CESCAiPTON gg l0l0l0l l NA l

7 89 11 12 80 OFFSITE CONSEOUENCES

-l g l Minimal to None l

7 09 80

-l

,l LOSS OR OAMAGE TO FACIUTY TYPE DESCRIPTICN dl NA l

1 7 89 10 80 PUBUCITY M l Local newspapers notified December 28, 1976.

l 7 89 80 S

7N AOOITIONAL FACTORS 8003270 5

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-j

' v' ~ 0 9 80 DE I l Li 7 89 80 om senhth NAME:

PHONE:

GPO 881 667 i

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