ML18011A224

Special Rept:On 930928,identified That 10 Used Incore Detectors Not Accounted For.Most Probable Disposition Is That Detectors Inadvertently Mixed W/Other LLW Matl & Shipped to Seg in Apr 1993.Procedures FMP-108 & 109 Revised

ML18011A224
Person / Time
Site:	Harris
Issue date:	10/27/1993
From:	Robinson W CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
HO-930195, NUDOCS 9311030349
Download: ML18011A224 (5)

Text

ACCELERATF 9 DOCUMENT DISTB~~UTION SYSTEM REGULAT . 1NFORMATION DISTRIBUTIOh~~YSTEM (RIDS)

ACCESSION NBR:9311030349 DOC.DATE: 93/10/27 NOTARIZED: NO DOCKET I FACIL:50-400 Shearon Harris Nuclear Power Plant, Unit 1, Carolina 05000400 AUTH. NAME , AUTHOR AFFILIATION ROBINSON, Wi.R. Carolina Power & Light Co.

RECIP.NAME -

RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Special rept:on 930928,identified that 10 used incore detectors not accounted for. Most probable disposition is that detectors inadvertently mixed w/other LLW matl & D shipped to SEG in Apr 1993.Procedures FMP-108 & 108 revised.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.

/

NOTES:Application for permit renewal filed. 05000400 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL D PD2-1 LA 1 1 PD2-1 PD 1 1 LE,N 1 1 D INTERNAL: ACRS 2 2 AEOD/DOA 1 1 AEOD/DSP/TPAB 1 1 AEOD/ROAB/DSP 2 2 NRR/DE/EELB 1 1 NRR/DE/EMEB 1 1 NRR/DORS/OEAB 1 1 NRR/DRCH/HHFB 1 1 NRR/DRCH/HICB 1 1 NRR/DRCH/HOLB 1 1 NRR/DRIL/RPEB 1 1 NRR/DRSS/PRPB 2 2 RR/~D pSA/SPLB 1 1 NRR/DSSA/SRXB 1 1 REO FILR 02 1 1 RES/DSIR/EIB 1 1 GN2 FILE 01 1 1 EXTERNAL: EG&G BRYCEpJ.H 2 2 L ST LOBBY WARD 1 1 NRC PDR 1 1 NSIC MURPHY,G.A 1 1 NSIC POORE,W. 1 1 NUDOCS FULL TXT 1 1 D

A NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP VS TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 504-2065) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 30 ENCL 30

Carolina Power 5 Light Company Harris Nuclear Plant P. O. Box 165 New Hill, NC 27562

'OCT 2'7 1995 Letter Number: HO-930195 U.S. Nuclear Regulatory Commission ATTN: NRC Document Control Desk Washington, DC 20555 SHEARON HARMS NUCLEAR POWER PLANT UNIT 1 DOCKET NO. 50-400 LICENSE NO. NPF-63 30 DAY WRITTEN FOLLOW-UP REPORT Gentlemen:

In accordance with Title 10, Parts 20 and 70 of the Code of Federal Regulations, the enclosed Written Follow-up Report is submitted. This report fulfills the requirement for a written follow-up report within thirty (30) days for missing Special Nuclear Material per 10CFR20.2201 and within thirty (30) days following a loss of Special Nuclear Material per 10CFR70.52. This report is in accordance with the format and content requirements set forth in the above parts as well as Title 10 Part 50.73.

Very truly yours, W. R. Robinson General Manager Harris Nuclear Plant MV:

Enclosure cc: Mr. S. D. Ebneter (NRC - RII)

Mr. N. B. Le (NRC - PM/NRR)

Mr. J. E. Tedrow (NRC - SHNPP) o oog,,-

931i030349 93i027 PDR ADOCK 05000400 S PDR

NRC FORM 366 APPROVED BY OHB NO. 3150-0104 (5-92) EXPIRES 5/31/95 EST I HATED BURDEN PER RESPONSE TO COMPLY WITH SPECEAL REPORT THIS INFORMATION COLLECTION REQUEST: 50.0 HRS.

FORWARD COMMENTS REGARDING BURDEN ESTIHATE TO THE INFORMATION AND RECORDS MANAGEMENT BRANCH (See reverse for required number of digits/characters for each block) (HNBB 77I4), U.S. NUCLEAR REGULATORY COMMISSION, I WASHINGTON, DC 20555-0001, AND TO THE PAPERWORK REDUCTION PROJECT (3150-0'l04), OFFICE OF MANAGEMENT AND BUDGET WASHINGTON DC 2D503.

FACILITY NAME (1) Shearon Harris Nuclear Plant-Unit ¹1 DOCKET NUMBER (2) PAGE (3)

. o5ooo/4oo 1 OF 3 TITLE (4) 30 Day Written Follow-up Report for the loss of ten (10) used Incore Detectors (S ecial Nuclear Material).

EVENT DATE (5) LER NUHBER (6) REPORT DATE 7) OTHER FACILITIES INVOLVED B SEOUENTIAL REVISION FACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR NUHBER HUNGER HONTH DAY YEAR 05000 FACILITY NAME 9- 28 93 N/A 10 27 DOCKET NUMBER 05000 OPERATING THIS REPORT IS SUBHITTED PURSUANT TO THE REQUIREMENTS. OF 10 CFR 5: (Check one or mor e) (11)

HODE (9) 20.402<b) 20.405(c> 50.73(a>(2)(iv) 73.71(b)

POWER 20.405(a)(1)(i) 50.36(c) <1) 50.73(a)(2)(v) 73.71(c)

'IOO/

LEVEL (10) 20.405(a)(1)(ii ) 50.36(c)(2) 50.73(a)(2)(vii) OTHER 20.405(a)(1)(iii) 50.73(a)(2)(i) 50.73(a)(2)(viii)(A) (Specify in 20.405(a)(1)(iv) 50.73(a)(2)(ii) 50.73(a)(2)(viii)(B) Abstract below and in Text, 20.405(a)(1)(v) 50.73(a)(2)(iii) 50.73(a)(2)(x) NRC Form 366A)

LICENSEE CONTACT FOR THIS LER (12)

(Include Area Code)

NAME Michael Verrilli TELEPHONE NUMBER (919) 362-2303 COMPLETE ONE LINE FOR EACH COMPONENT FAILURE DESCRIBED IN THIS REPORT (13)

REPORTABLE REPORTABLE CAUSE SYSTEM COMPONENT MAHUFACTURER CAUSE SYSTEM COMPONENT MANUFACTURER TO NPRDS TO HPRDS SUPPLEHENTAL REPORT EXPECTED (14 EXPECTED MONTH DAY YEAR YES SUBHISSION (If yes, complete EXPECTED SUBHISSION DATE). X NO DATE (15)

ABSTRACT (Limit to 1400 spaces, i.e., approximately 15 single-spaced typewritten lines) (16)

On September 28, 1993, during efforts to consolidate radioactive material for a future burial shipment, Health Physics personnel identified that used incore detectors were not accounted for in the designated ten'10) radioactive waste. storage areas. These detectors utilize a f3.ssion chamber containing enriched Uranium 235, which classifies them as Special Nuclear Material g(SNM) . The combined SNM we'ght contained in the missing detectors is approximately 0.03 grams. An extensive search was conducted over the=

next Sour days, including a trip to the contracted low-level waste processing fac3.lity, S.E.G. in Oak Ridge Tennessee, but the detectors were not found. On October 4, 1993, a meeting was conducted to ensure that all possible efforts to locate the detectors had been exhausted. A conclusion was reached that a loss of non-fuel Special Nuclear Material (SNM) had occurred. The root cause of this event was a lack of accountability on the part of the SNM custodian designee. This included performing a paperwork, vice physical six-month inventory, poor maintenance of SNM records and not roperly marking/segregating non-fuel SNM. There was also a lack of nowledge/train>.ng among various work groups on what non-fuel SNM means and it's importance. Corrective actions included assignment of a new SNM custodian designee, development of labeling for SNM to distinguish it from other radioact3.ve material, designation of separate locked storage areas for non-fuel SNM, development of access controls and clear posting for the non-fuel SNM storage areas, and revising the SNM inventory procedure.

Additional actions will: include a revise.on to the SNM accountability procedure and training for applicable personnel.

The most probable disposition scenario is that this material was inadvertently mixed with other low-level radwaste and was shipped to S.E.G.

in Oak Ridge Tennessee in April 1993.

NRC FORH 366A U.S. NUCLEAR REGULATORY COHHISSION APPROVED BY OHB NO. 3150-0104 (5-92) EXPIRES 5/31/95 ESTIHATED BURDEN PER RESPONSE TO COMPLY WITH THIS INFORHATION COLLECTION REOUEST: 50.0 HRS.

SPECIAL REPORT FORWARD COHHENTS REGARDING BURDEN ESTIHATE TO THE INFORHATION AND RECORDS HANAGEHENT BRANCH (HNBB 7714), U.S. NUCLEAR REGULATORY COHHISSION, WASHINGTON, DC 20555-0001, AND TO THE PAPERWORK REDUCTION PROJECT (3150-0104), OFFICE OF HANAGEHENT AND BUDGET WASHINGTON DC 20503.

FACILITY NAHE (1) DOCKET NUHBER (2) LER NUHBER (6) PAGE (3)

Shearon Harris Nuclear Plant YEAR SEQUENTIAL REVISION Unit Nl 05000/400 2 OF 3 N/A TEXT (If more space is required. use additional copies of NRC Form 36Q) (17)

DESCRIPTION OF MATERIAL INVOLVED:

The Special Nuclear Material involved in this event is enriched Uranium 235 (and decay products), which is utilized in, the incore detector's fission chamber. The combined SNM weight of the ten missing detectors is approximately 0.03 grams.

DESCRIPTION OF CIRCUMSTANCES UNDER WHICH LOSS OCCURRED:

On September 28, 1993, during efforts to consolidate radioactive material for a future burial shipment, Health Physics personnel identified that ten (10) used incore detectors were not accounted for in the designated radioactive waste storage areas. These detectors utilize a fission chamber containing enriched Uranium 235, which classifies them as Special Nuclear Material (SNM). The combined SNM weight contained in the missing detectors is approximately 0.03 grams. An extensive search was conducted over the next four days, including a trip to the contracted low-level waste processing facility, S.E.G. in Oak Ridge Tennessee, but the detectors were not found. On October 4, 1993, a meeting was conducted to ensure that all possible efforts to locate the detectors had been exhausted. A conclusion was reached that a loss of non-fuel Special Nuclear Material (SNM) had occurred. The root cause of this event was a lack of accountability on the part of the SNM custodian designee. This included performing a paperwork vice physical six-month inventory, poor maintenance of SNM records and not properly marking/segregating non-fuel SNM. There was also a lack means of knowledge/training among various work groups on what non-fuel SNM and it's importance. Corrective actions included assignment of a new SNM custodian designee, development of labeling/tagging for SNM to distinguish it from other radioactive material, designation of separate locked storage areas for non-fuel SNM, development of access controls and clear posting for the non-fuel SNM storage areas, and revising the SNM inventory procedure. Additional actions will include a revision to the SNM accountability procedure and training for applicable personnel.

DISPOSITION OF MATERIAL:

Based on a review of the above listed circumstances and sequence of events, the most probable disposition of the ten incore detectors is that material while in it was storage inadvertently mixed with other low-level radwaste in WPB room 144A, then shipped to SEG in April of 1993 for processing prior to burial.

RADIATION EXPOSURES TO INDIVIDUALS IN UNRESTRICTED AREAS:

Based on the fact that the incore detectors had low radiation levels and that they were handled as low-level radwaste, no exposures to personnel in unrestricted areas occurred as a result of this event.

NRC FORH 366A (5-92))

NRC FORM 366A REGULATORY COMMISSION APPROVEO BY OMB NO. 3150 ~ 0104 (5.92) EXPIRES 5/31/95 ESTIMATED BURDEN PER RESPONSE TO COMPLY WITH THIS INFORMATION COLLECTION REQUEST: 50.0 HRS ~

FORWARD COMMENTS REGARDING BURDEN ESTIMATE TO SPECIAL REPORT tHE INFORHATION AND RECORDS HANAGEHENT BRANCH (HNBB 7714), U.S. NUCLEAR REGULATORY COMHISSION,

'WASHINGTON, DC 20555-0001, AND TO THE PAPERWORK REDUCTION PROJECT (3150-0104), OFFICE OF MANAGEMENT AND BUDGET WASHINGTON DC 20503.

FACILITY NAME (1) DOCKET NUMBER (2) LER NUMBER (6) PAGE (3)

Shearon Harris Nuclear Plant YEAR SEQUENTIAL REVISION Unit g1 osooo/4oo N/A 3 OF 3 TEXT (If more space is required, use additional copies of NRC Form 36Q) (17)

ACTIONS TAKEN or will be taken TO RECOVER THE MATERIAL:

An extensive search was conducted in all plant areas that the used incore detectors could reasonably have been placed. A trip was also made to SEG's facility in Oak Ridge Tennessee to search the remaining radwaste material received from HNP that had not been incinerated. Based on the conclusion that the material was processed by SEG, no further actions will be taken to locate the detectors.

PROCEDURES OR MEASURES WHICH HAVE BEEN or will be ADOPTED TO PREVENT RECURRENCE:

1. A new Special Nuclear Material Custodian Designee was assigned.

2. Labeling/tagging for non-fuel SNM has been created to ensure that it will be distinguished from other radioactive materials.

3. Separate locked storage areas for non-fuel SNM have been designated.

4. Access controls and clear postings for the non-fuel SNM storage areas have been developed.

5. FMP-108 (governing procedure for conducting SNM inventory) has been.

revised to specifically define SNM inventory requirements.

6. Revise FMP-109 (SNM Accountability Plan/Procedure) to clearly delineate HP/Maint/Stores/Deconners responsibilities regarding SNM.

This shall include the requirement for a "pre-job" briefing prior to SNM transfer activities and specific guidance on the completion of the transfer form.

7. The review and approval process for SNM procedures (FMP-108 & FMP-109) has been changed to include all affected organizations.

8. Provide training on the above listed actions for applicable personnel.

9. Perform a 'follow-up review to assess the effectiveness of above corrective actions.

This condition is being reported per 10CFR20.2201(a)(ii) and 10CFR70.52(b) to satisfy the requirement for a written follow-up report within 30 days.

NRC FORM 366A (5-92)