ML112410900

LER 81-007/03L-0:on 810219,during Normal Operation,Pressure Differential Across RHR Svc Water Strainer 1S-90B Read High, Resulting in Loop B Inoperability.Caused by Sand Plugged in Strainer Mesh.Strainer Cleaned

ML112410900
Person / Time
Site:	Duane Arnold
Issue date:	03/11/1981
From:	Rager M IES Utilities, (Formerly Iowa Electric Light & Power Co)
To:	NRC/OI/RGN-III/FO
Shared Package
ML112410901	List: ML112410900 ML19347D371
References
LER-81-007-03L, LER-81-7-3L, NUDOCS 8103170504
Download: ML112410900 (3)

Text

REGUL ATRY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:810317050 DOC.DATE:.81/03/11 NORIZED: NO DOCKET #

FACIL:50-331 Duane Arnold Energy Center, Iowa Electric Light & Pow 05000331 AUTHINAME AUTHOR AFFILIATION RAGER!,M.8a Iowa-Electric.Light.& Power Co.

RECIPNAMEZ RECIPIENT AFFILIATION,'

Region 3, Chicago,.Office of the Director SUBJECTs LER 81*007/03L*Oon 810219,durlng normal operationrpressure differential across RHR svc water tstrainer 18-908 read high, resulting in loop B inoperabilltyCaused by sand plugged in strainer mesh.Strainer cleaned.

DISTRIBUTION CODE: A002S COPIES RECEIVED:LTR I'ENCL -t SIZE: Vw TITLE: IncidentlReports NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL ACTION: IPPOLITOt, 04 3 3 INTERNAL: A/D COMP&STRU06 1 1 A/D ENV TECH 07 1 A/D MATL & QU08. 1 1 A/D OP REACT009 1 A/D PLANT SYSI0 1 1 A/D RAD PROT 11 1 A/D SFTY ASSE12 1 1 ACC EVAL BR 14 1 AEOD 3 3 ASLBP/J.HARD, AUX SYS BR 15 1 1 CHEM ENG BR 16 CONT SYS SR 17 1 1I CORE PERF BR 18 DIRENGINEERI20. .1 1 DIRHUM FAC 821 1.

DIRSYS INTEG22t *1 1 EFF TR SYS BR23c 1 EQUIP QUAL BR25 1 1 GEOSCIENCES 26 29, 1 1I I&E 05 2 I&Ct SYS BR JORDANE./IE' I 1 LIC GUID BR 30 1 MATL ENG BR 38 1 1I MECH ENG BR 33 1 MPA 3 3 NRC PDR 02 1 OP EX EVAL BR34 3 3 OR ASSESS BR 35 1 POWER SYS BR 36 1 1 RAD ASSESS BR39 I REACT SYS BR 40 1 1 1225= 01 1 REL & RISK A 41 1  ! SFTY PROG EVA42 1 STRUCT ENG BR44 1 1 SYS INTERAC B45 1 EXTERNAL: ACRS 46 16 16 LPDR 03 1 1 NSIC 05 1 1

~AP~ t B ~

TOTAL NUMBER OF COPIES REQUIRED: LTTR 66 ENCL'; 66

Iowa Electric Light and Power Company March 11, 1981 DAEC-81-142 Mr. James G. Keppler, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission - Region III 799 Roosevelt Road Glen Ellyn, IL 60137 MAR 16 1981

Subject:

Licensee Event Report No.81-007 amanun (30 day)

File: A-118a v46

Dear Mr. Keppler:

In accordance with Appendix A to Operating License DPR-49, Technical Specifications and Bases for Duane Arnold Energy Center and Regulatory Guide 10.1, please find attached a copy of the subject Licensee Event Report. (Total of.3 copies transmitted).

Very truly yours, Daniel L. MinecK Chief Engineer Duane Arnold Energy Center Docket 50-331 attachment DLM/MSR/pl cc: Director, Office of Inspection and Enforcement (30)

U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Director, Management Information and Program Control (3)

U. S. Nuclear Regulatory Commission Washington, D. C. 20555 U. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D. C. 20555 NRC Resident Inspector - DAEC I1unnle Arnoid Energy Center

• P0. BoN: 351

• Cedar Rapids, Iowa 52406

• 319/851-5611

NRC FORM 364 U. S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: JPLEASE .D PRINT OR TYrd ALL REQUIRED INFORMATION) 10 a

] r[AESAC 1 0 C00E 4 15 LICENSE NUMBER 25 25 LICENSE TYPE JO CON'T ORCE L 10 5 10 0 0 131 3 L 1 (0 12 11 91 8 1 0 131 11 11 81 1 60 61 COCKcT NUMOER 68 69 EVENT DATE 74 75 REPORT DATE SO EVENT OESCRIPTION AND PROBABLE CONSEQUENCES 02[ lDuring normal operation, pressure differential across RHR Service Water 03 Strainer(lS-90B) was reading high indicating a plugged strainer. This re.

[] Isulted in the "B" loop of RHR Service Water being considered inop. In ac Os I cordance.with Tech Spec 3.5.C.3 a 7-day LCO was initiated. Redundant loo r0 6 lp was functionally tested sat. The 7-day LCO was terminated on day 4 whe In the strainer was cleaned and tested-sat. No previous occurrences with 08I these self-cleaning strainers.

.7 89 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCOOE COMPONENT CODE SUSCODE SUSCOOE Cl F)1 [LE_ L F (IIL IT [EIR (3 [I I O It 12 13 I8 19 20 SEOUENTIAL OCCURRENCE REPORT REVISION LER/RO EVENT YEAR REPORT NO. co0 Type NO.

REP0RT L...] -01017 L031 L] ...

r 21 22 23 24 26 27 ,S 2" 30 12 ACTION FUTURE EFFECT SHUTDOWN A"TACHMENT NPRO-4 PRIME COMP TAKEN ACTICN ON PLANT METHOO HOURS STTEDSA 22 SSMITED ORM wa.SUPPEA MANUFACTTJAEA JLJ~_ 33 ~ ~~~ 30 WL2LW @~J LAJ@

142.34 NLi IJ LL0 11Z 10 16 074 CAUSE DESCRIPTiON AND CORRECTIVE ACTIONS 1, Sand a little larger than the strainer's mesh became lodged in

[ ] I the mesh and could not be backwashed. Strainer was disassembled and clea

( I ned. "B" loop of RHR SW was tested sat. 1S-90B is a Zurn Industries 16-i

[ nch Self-Cleaning Strainer. Per manuf recommendations maint. proc will b i4 Ie written to require inspection and cleaning of strainers semi-annually.

' 8 9 FACILITY -MTHOO OF 80 STATUS %POWER OTHER STATUS DISCOVERY DISCOV Y OESCxIPTtON T LEU I 1@ 19 16 ](1 NA j j2 Operator Observation 7 a 9 10 12 13 44 45 46 ACTIVITY CONTENT t OLA RELEASED OF RELEASE AMOUNT OF ACTvvNA EIWL 7

UUI NA__ __ _ _ _ _

8 9 10. N 44 45 PERSONNEL EXPOSURES NUpaER TYPE DESCRIPTION 7

[

8 9 loA lo01L Z (i . NA 1 2 13 PERSONNEL INJURIES NUMEER OESCR!PTONe4 s89, LQaL 0 o ai) 1 12 NA 8

LOSS OF OR DAMAGE TO FACILITY g TYPE DYESCRIPTION 7 9 Ip 1080 NA etI O PUSL 'CITYs

? m8 ISSUED 9

DESCRIPTION 10 1 NAI A

1 68 69 80*;

NAME OF PREPARIER Matthew S. Rager PHONE. 319-851-5611