05000325/LER-1982-135, Supplemental LER 82-135/03L-1:on 821019,1.5-inch Discrepancy Noted Between Narrow & Wide Range Instruments.Caused by Inoperable RTGB Level Instruments.Plant Mod Package Developed to Increase Accuracy

Supplemental LER 82-135/03L-1:on 821019,1.5-inch Discrepancy Noted Between Narrow & Wide Range Instruments.Caused by Inoperable RTGB Level Instruments.Plant Mod Package Developed to Increase Accuracy

ML20070K987
Person / Time
Site:	Brunswick
Issue date:	12/23/1982
From:	Pastva M CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20070K977	List: 05000325/LER-1982-135, Supplemental LER 82-135/03L-1:on 821019,1.5-inch Discrepancy Noted Between Narrow & Wide Range Instruments.Caused by Inoperable RTGB Level Instruments.Plant Mod Package Developed to Increase Accuracy
References
LER-82-135-03L, LER-82-135-3L, NUDOCS 8212300334
Download: ML20070K987 (2)

LER-2082-135, Supplemental LER 82-135/03L-1:on 821019,1.5-inch Discrepancy Noted Between Narrow & Wide Range Instruments.Caused by Inoperable RTGB Level Instruments.Plant Mod Package Developed to Increase Accuracy

Event date:
Report date:
3252082135R00 - NRC Website

text

r

NRC FORM 366 U. S. NUCLEA7 RE2ULATORY COMMIS$lON l (T77) Update R port

,j , LICENSEE EVENT REPORT Previous R: port Date 11-18-82 CONTROL BLCCK: l l l l l l l (PLEASE PRINT CR TYPE ALL RE%UIRED INFORMATION) .

1 6 i l0 l1l8 9l Nl Cl 7

Bl El Pl 1l@l LICENSEE CODE 14 0 l 0 l -l 0 l 0LICENSE lb l 0 lNUMBER 0 l 0 l - l 0 l 0 25l@l 264 l 1LICENSE l 1 l 1l 1 l@l$7 CAT TYPE JO l

68 l@

CON'T

" "7 10Iil s$R l L l@l 0l 5 l 0 l - l 0 l 3 l 2 l 5 l@l l l 0 l 1 l 9 l 8 l 274l@l75 l j 2 l 2 l 3 l 8 l 280l@

7 8 60 61 DOCKET NUM8ER 68 69 EVENT DATE REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l0l2] l During plant operation, performance of the Suppression Pool Level Indicator's l l o 3 l Operability Test, PT-08.1.6, revealed a 1.5" discrepancy between the narrow and wide l l

[ o l 4 l l range instruments, while a check of the local level indicator showed the level was l l [ o i s ; [ -25.5". The level was then returned to within specification in accordance with l l o is l l specified time limitations. The instrumentation failure is being reported in l l O l 7 l l LER l-82-110. This event did not affect the health and safety of the public. l I O ls i l Technical Specifications 3.6.2.1, 6.9.1.9b l l 7 8 9 DE CODE SUBC E COMPONENT CODE SUBCODE SU E l0l9l 8 9 l Sl Hj@ g@ g@ lI lN lS lT lR lU l@ ]@ ]@

10 7 11 12 13 18 19 20 SEQUENTI AL OCCUR R E NCE REPORT REVISION

_ EVENT YEAR REPORT NO. CODE TYPE NO.

@ LER RO l8l2l

_ 21 22 l__l 23 l1l3l5l 24 26 jfl 27 l0 l3 l 28 29 l30Ll g ]

31 32 l KEr ACT ON PL NT MET HOURS SB IT FOR B. SUP LI R MANUF CTURER W@W@

33 34

[Z_J@

35 l Z_j@

l0 l0 l0 l0 l 3/ W@ lY l@ lNl@

41 l44B l 0 l 4 l C47 l@

i 40 42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h j i l o l l This event occurred due to the inoperability of the subiect RTGB lerel instruments. l l

i i  ! Prior to this event there were no planned level changes which would have alerted the i l

, 7 l Control Operator of the instruments' inoperability. It is felt that present plant l l,l3; l procedures, which require a level instrumentation comparison prior to any planned l l iig4i [ level changes, are sufficient in the prevention of future similar events. l l 7 8 9 80 ST S  % POWEH OTHER STA TUS ISC VR DISCOVERY DESCRIPTION l1 l5l J @ l0l5l9l@l NA l l B l@j Periodic Test l A TiVITY CO TENT RELE ASED OF RELE ASE AMOUNT OF ACTIVITY 35 LOCATION OF RELEASE l

1 l1 l6l[Z)@(Zjgl 7 8 9 10._ 11 NA l l NA l

44 45 PEHSONNEL E xrOSURES 80 NUY8ER TT PE DESCRIPTION Ii' 1il"10101 Ol@LzJ@l NA l

PERSONNE L INJU IES

! NUURE R DESCRIP TION Uh] 8I 90101 Ol@l 7 11 12 NA l

L OSS OF OR DAM AGE TO FACILITY go TYPE DE SCRIPTION 1 o LZ]@l NA l

Pust iETY 8212300334 821223 8 PDR ADOCK 05000325 S

NRC USE ONLY ,

lTJT]8 9isst$[@UESCRIPTION l l PDR A l lllllllllllllj 7 10 68 69 80 7,,

NAME OF PREPARER - PHONE:

, q, . ' o L, LER ATTACHMENT - RO #1-82-135 Facility: BSEP Unit No. 1 Event Date: October 19, 1982 As a result of an event involving suppression chamber level instrumentation on Unit No. 1, reported in LER 1-81-07 and several subsequent LERs and a post-TMI requirement, a plant modification package has been developed which will install'a condensing pot in the reference leg to increase the accuracy and reliability of this instrumentation, and remove .the requirement to have flow in the reference leg to ensure that'it is full. Following the assurance of this modification's reliability, the comparison of these instruments' indications to local indication will be discontinued.

1 i

l

_ . _ . _ , _ , , _ - . . - . -~-