ML19257A530

LER 79-042/03L-0:on 791127,channel Zero Gradient Pressurizer Pressure Transmitter of Engineered Safety Features Sys Placed Out of Svc to Correct Transmitter Zero Shift & Repair Condulet to Fire Sys Water Line Hanger.Transmitter Recalibr

ML19257A530
Person / Time
Site:	Calvert Cliffs
Issue date:	12/20/1979
From:	Davis S, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19257A527	List: ML19257A526 ML19257A530
References
LER-79-042-03L, LER-79-42-3L, NUDOCS 8001040566
Download: ML19257A530 (2)

Text

NRC FOPM 366 U.S. NUCLEAR REGULATORY COMMISSION (7 R)

. ', LICENSEE EVENT REPORT CONTROL BLOCK: [l 1

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lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

ElM 7 8 9 I D LICENSEE I C l cCODE l N I 2 l@l 010 l- 1010101010 14 15 LICENSE NUMSER l- 1010 l@l4 25 26 1l1l1l1l@l CAT LICENSE TYPE JO 57 l l 58@

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 l At 1130 channel ZG pressurizer pressure transmitter of the engineered  ;

o a Isafety features system was olaced out of service in accordance with I o 4 T.S. 3.3.2.1 for recair of a condulet and correct a transmitter zero I o s Ishift. The three redundant channels remained operable during the I o e levent. The transmitter was returned to service at 1615. This is not i o 7 l a reDetitive occurrence. [ ,

o a i I 7 8 9 80 0E OCE SUSC E COMPONENT CODE SL8CO DE SU o 9 I Z lZ l@ lB l@ lC l@ l Sl Ul Pl Ol Rl Tl@ l A lg lf lE@

7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION L EVENT YEAR R EPORT NO. CODE TYPE NO.

O a'ER/RO yuMg l21 71 l-l l0 l412 l l/l l 0131 lLI l- Lo_]

_ 22 9l 23 24 26 27 3 a 30 31 32 N A O O P T ME HOURS S8 I E FOR 8. SUP L E MANUFAC RER 12 33 l@l34 Fl@ l Zi@

35 lZ 36 l@ l 01010l 0l 37 l Yl g 41 lN lg Ll@ Il 2 l 0 l 71@

40 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o l Found transnitter 2-PT-102D cut of calibration; it had zero-shifted to a  ;

i i Isianal level anoroximately 28 csi high. The transmitter was recalibrated i i 2 Iand its condulet recaired. The cause was the close oroximity of the condulet i i 3 l to a fire system water line hanaer. Voverent of the cine systen caused the i 4 I hancer to contact the condulet on the transmitter base. (CONT.) I 7 8 9 80 SYA  % POWER OTHER STATUS 015 O Y DISCOVERY 0ESCRIPTION i s l Cl@ l01010 l@l M/A l Bl@l Operator Observation l AbVITY CO TENT AMOUNT OF ACTtVITY LOCATION OF RELEASE i s W

• RELEASE

• @D OF RELEASE l Z l l@ll N/ N/A A l PERSONNEL EXPOS ES NUMSER TYPE DESCRIPTION 1 7 l 0 ] 0 l 0 l@l Z l@l N/A l PERSONN EL INJURIES Nuu8ER cESCRiPTiON@

7 1 a 8 9 lOl0lOl@lM/A 11 12 80 l

T E DESC PT ON i 9 l Zl@l N/A } []O FJ ) l 7 8 9 to 80 2 o l Nl l IS3UED@DE N/A CRIPTION l [!ll!!lllllll}

7 8 9 to 68 69 80 ~.

NAME OF PREPARER

. . a s/ . . o PHCNE: (301) 234-79a2/7986 2 8001040 M

LER NO. 79-42/3L DOCKET fl0. 50-318 EVENT DATE 11/27/79 REPORT DATE 12/21/79 ATTACHMENT CAUSE DESCRIPTION AND CORRECTIVE ACTION: (CONTINUED)

The hanger will be modified to insure the fire system water line cannot contact the transmitter.

1685 137

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