ML112410873

LER 81-004/03L-0:on 810111,drywell Particulate Radiation Monitor B Failed Downscale.Caused by Condensate on NMC Model RAK-221F Radiation Element Re 8101B.Design Review Initiated & Particulate & Iodine Filters Examined Daily

ML112410873
Person / Time
Site:	Duane Arnold
Issue date:	02/05/1981
From:	Rager M IES Utilities, (Formerly Iowa Electric Light & Power Co)
To:	NRC/OI/RGN-III/FO
Shared Package
ML112410874	List: ML112410873 ML19339C854
References
LER-81-004-03L, LER-81-4-3L, NUDOCS 8102120120
Download: ML112410873 (3)

Text

= REGULATO*)NFORMATION DISTRIBUTION TEM (RIDS)

ACCESSION NBR:8102120120. DOCDATE: 81/02/05 NOTARIZED: NO DOCKET #

FACIL:50-331 Duane Arnold Energy Center, Iowa Electric Light & Pow 05000331 AUTH.NAME AUTHUR AFFILIATION RAGERMS, Iowa Electric Light & Power Coo RECIP.NAMET RECIPIENT AFFILIATION Region 3, Chicago, Office of the Director

SUBJECT:

LER 81"004/03L-0:on 810111,drywell particulate radiation monitor 8 failed downscale.Caused by condensate on NMC Model RAK-221F radiation element RE 8101B,Design review initiated

& particulate.& iodine filters examined daily*

DISTRIBUTION CODE: A0028 COPIES RECEIVED:LTR -ZENCL , SIZE:., W TITLE: Incident Reports 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 A/D ENV TECH 07 1 A/ MATL & QU08 A/D OP REACT009 1 A/D PLANT SYSO. A/D RAD PROT 11 1 A/D SFTY ASSE12 ACC EVAL BR 14 1 AEOD ASLBP/J.HARD 1 AUX SYS BR 15 CHEM ENG BR 16 1 CONT SYS BR 17 CORE PERF BR 18 1 DIRDIV OF LIC DIRENGINEERI20 1 DIRHUM FAC $21 DIRSYS INTEG22 1 EFF TR SYS BR23c EQUIP QUAL BR25 1 GEOSCIENCES 26 I&C SYS BR 29 1 I&E 05 JORDANE,/IE .1 LIC GUID BR 30. MATL ENG BR 32 1 MECH .ENG BR 33 MPA 3 NRC PDR 02 OP EX EVAL BR34 35 OR ASSESS BR 35. POWER .SYS BR 36 1 SBR39 REACT SYS BR 40 1 FILE 01 REL & RISK A 41 1

' 8FTYZ EVA 42 STRUCT ENG BR44 1 /

SYS INTERAC 845 EXTERNAL; ACRS 46 16 16 LPDR 03 1 1 NSIC 05i 1 1 TERA:DOUG MAY 1 1 A.% At TOTAL NUMBER OF COPIES REQUIRED: LTTR 68 ENCL 68 Lb

Iowa Electric Light and Power Company

_U February 5, 1981 DAEC-81-82 Mr. James G. Keppler, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission - Region III 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Licensee Event Report No.81-004 (30 day)

File: A-118a

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/MSP/pJ 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 Huane Arnoid Energy Center

• PO. BoX 351

• Cedar Rapids, Iowa 52406

• 319/851-5611

NRCFOR M 316 U. S. NUCLEAR REGULATORYV COMMISSION (771~R LICENSEE EVENT REPORT CONTROL SLOCK: (PLEASE PRINT OR TYod ALL REQUIRED INFORMATION) 7 a 9 lA ID A IC 11 10I 001 0 -1 0 10 1 LICENSEE CODE 14 is LICENSE NUMBER 0Q0Q1101 --0 0 (DI4111L.111 25 26 LICFNSE TYPE 30 57 AT 58 n

CON'T LL RR 10 15 10 0 101 313 1 0) 1 1 1 [ b 1t1 01 21 01 51 81 110 7 8 60 61 COCKEY NUMBER 6a 69 EVENT DATE 7 75 REPOAT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES During normal power operation the "B" Drywell Particulate Radiation Moni tor failed downscale. Redundant radiation monitor element RE 8101A had p Ireviously been declared inop. This placed the plant in a 7-day LCO in ac cordance with Tech Spec 3.6.C.2 which requires both the sump and air sam Ipling systems be operable durinq reactor power neeration Mnisture on th 1 je detector is a repetitive problem. See LER 81-003,81-001, 80-038. 78-0 19, 77-04, and 77-03.

V80 7 8 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT CODE SUBCODE SUBCOCE:

7 8 9 cl IL@ LE@

to It E [ 12 hi NI SI TI RI UI 13 18 L J 19 L7 20 SEOUENTIAL OCCURRENCE REPORT REVISION LERRO VENT YEAR REPORT NO. cos Type NO.

(DNUMEl [a ll_

N 2 2ME1R 23

_-J 24 0I 0 41 25 27

-- ' 1 1 01 329 ILU1 20 1-1.

LOJ ACTION FUTr'pE EFFECT SuTOCwN A-TACHMENT' NI-C.4 PRIMEComm. COMPONENT MANUFACTURER TAKEN ACTION ON PLANT METHOO HOURS 2 SUIMITTED FORM tU8. SUPPLIER L..L1FJ 33 34 I. 35 LLzO 6 37lo lato [ 40I LLn 410.@ Lt.JO 42 LL.J@

43 1Ni - n15@

4 17 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i7' IThe cause was determined to be condensate on RE 8101B. The moisture was TI removed from the detector prior to beinq reinstalled. The detector was 1 ource checked-sat. RE 81018 is an NMC model RAK-221F radiation element.

1] Design review has been initiated As an interim measure HP personnel are 1 exaining the particulate and iodine filters once per day.

FACILITY 30 METHOO OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION G

([ LJ IQ19 19 Ji NA I AJOiOperator Observation 7 8 9 10 12 11 44 45 46 30 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE EID LzJ @ LzJ l NA Is5 NA 80 1

7 a 9 10 iI 4 PERSONNEL ExPOSURES m7 1 NUMBER TYPE DESCRIPTION 7 8 9 InWo01 7 I@)

I1 12 13 NA 80 PERSONNEL INJURIES NUMBER DESCRPTION 7 8 S o1oL01 9 11 12 NA 80 I

LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION 7

'T 1 8 9 I1I 10 NA 80 I

PUBLICITY NAC USE ONLY ISSUED DESCRIPTION 7 8 9 10 68 69 80*. &

NAME OF PREPAAEA Matthew S-. Rager 319-851-5611