ML20005F715

LER 89-023-00:on 891211,hourly Firewatch Patrol Entered Posted High Radiation Area W/O Meeting Entry Requirements for Area.Briefings on High Radiation Entry Requirements Held for Personnel W/Assigned dosimetry.W/900110 Ltr

ML20005F715
Person / Time
Site:	Fort Calhoun
Issue date:	01/10/1990
From:	Morris K, Voss K OMAHA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-89-023, LER-89-23, LIC-90-0034, LIC-90-34, NUDOCS 9001170179
Download: ML20005F715 (4)

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Omaha Public Power District 1623 Harney Omaha, Netnaska 68102-2247 402/536 4000 January 10, 1990 LIC-90-0034 U. S. Nuclear Regulatory Commission '

Attn: Document Control Desk Mail Station P1-137 l Washington, DC 20555 )

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Reference:

Docket No. 50-285 Gentlemen:

Subject:

Licensee Event Report 89-023 for the Fort Calhoun Station -

Please find attached Licensee Event Report 89-023 dated January 10,

! 1990.

j 50.73(a)(2)(1)p(B).This re ort is being submitted per requirements of 10~CFR If you should have any questions, please contact me.

Sincerely,

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. . Morris i Division Manager l Nuclear Operations KJM/ tem Attachment c: R. D. Martin, NRC Regional Administrator A. Bournia, NRC Project Manager i P. H. Harrell, NRC Senior' Resident Inspector INP0 Records Center American Nuclear Insurers 9001*70179 900110 / 4, PDR ADOCK 05000285 V S PDC as siza tmoioumen n au iopponunitu

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FACILITY NAast til DOCKET NUGAGER (21 PAGE G3 Fort Calhoun Station Unit No. 1 TITLE les o is t olo lol2 8l5 ilorl0 3 Failure to Comply with High Radiation Area Access Requirements EVENT DATE (Si LER NUMBER 161 REPORT DATE 171 OTHEfl F ACILITIES INVOLVED 100 MONTM OAv "* MONTM DAY . ACILIT v howes OOCKET NUMBERI$1 YEAR YEAR * *, 0$U, ,f,*,$ vtAR N 015101010 1 1 I i

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tut ,, ACT ,o.4 ,, , .... . .. ,,- -, . .w .i On December 11, 1989, Fort Calhoun Station was operating at 100 percent power in mode 1. A Nuclear Security Sergeant (NSS) performing an hourly firewatch -

patrol entered a posted high radiation area without meeting the entry requirements for that area. The NSS failed to utilize an Integrated Alarming-Dosimeter while in the high radiation area. The NSS was in the room for less than a minute; later surveys indicated the dose rate in the occupied area was a) proximately 0.4 mr/hr. The cause of this event was a cognitive error made by tie NSS in not realizing the. area entered was a high radiation area, even though the door was plainly posted. The NSS received disciplinary action.

l l This report is being submitted pursuant to the requirements of 10 CFR l

50.73(a)(2)(1)(B) for the failure to comply with the requirements of Technical l Specification 5.11.1. I i

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Fort Calhoun Station Technical Specification 5.11.1 provides for high radiation )

l area access controls which are approved alternatives.to the requirements of 10 I

l CFR20.203(c)(2). One of the requirements specified for dose measurement is that any individual or group entering a high radiation area be provided with a l radiation monitoring device which continuously integrates the radiation dose l rate in the area and alarms when a preset integrating dose is received. This requirement is reflected in Radiation Protection Procedure RP-204 and appropriate Radiation Work Permits, and is normally met through the use of a-l XETEX Integrating Alarming Dosimeter. Radiation Work Permit (RWP) 89-673-1 specifically details radiological requirements for the Security Force with ,

respect to Door and Alarm Checks.

On December 11, 1989, the plant was operating in mode 1 at 100 percent power.

i A Nuclear Security Sergeant (NSS) was assigned to perform an hourly firewatch patrol at approximately 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br />. Oneofthedoors(989-4)listedonthe HourlyFirewatchPatrolLogwastotheChargingPumpValveroom(Room 7)inthe Auxiliary Building. When entering Room 7 via access door 989-4, one must walk to the end of a shield wall to observe the equipment area of the room. The room was plainly posted as a high radiation area on door 989-4. Upon entry into the Auxiliary Building Radiation Control Area, the NSS signed in on the l Pencil Dosimetry Log and reviewed RWP 89-673-1 prior to continuing the patrol.

The NSS proceeded to door 989-4 but failed to recognize the high' radiation area posting. Because of this failure to note that the room was a high radiation area, the NSS did not procure a XETEX Integrating Alarming Dosimeter prior to entry.

At approximately 1340 hours0.0155 days <br />0.372 hours <br />0.00222 weeks <br />5.0987e-4 months <br /> the NSS entered Room 7 via door 989-4, walked to the end of the bioshield wall, visually inspected the room, and immediately exited the area. The NSS was in the room for less than one minute. A '

Radiation Protection Technician who was touring the area noticed when the NSS exited the room that the NSS was not wearing a XETEX dosimeter. The NSS was asked about not wearing a XETEX dosimeter in a high radiation area. At that time the NSS realized that Room 7 was a posted high radiation area. When leaving the Radiation Controlled Area the NSS informed Radiation Protection personnel in the Radiation Protection office what had occurred. The Radiation Protection personnel then informed the Radiation 0)erations Coordinator of the incident. Upon return of the NSS to the security )uilding, the Shift Security Supervisor was informed of the incident.

This event constituted a failure to comply with the high radiation area entry requirements of the Technical Specifications and station procedures. This report is submitted pursuant to the requirements of 10 CFR 50.73(a)(2)(i)(B).

Investigation and analysis revealed that the cause of this event was a cognitive personnel error by the NSS in failing to realize that Room 7 was a high radiation area. Lack of attention and carelessness resulted in failure to comply with high radiation area access controls. Training and posting associated with high radiation area access were determined to be adequate and not contributing factors.

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The following corrective actions were completed:

(1)At1445hoursonDecember 11, 1989 a radiological survey of the part of Room 7 near door 989-4 and the shield wall was performed. The survey revealed a dose rate of less than 0.4 mr/hr in the portion of the room traversed by the NSS.

(2)TheThermo-LuminescentDosimeter(TLD)assignedtotheNSSwaspulledand authorization for the NSS to enter the Radiation Control Area was revoked.

(3)TheNSSwassuspendedfromdutypendingmanagementinvestigation '

l completion. Following preliminary investigation, disciplinary action was administered to the NSS. ,

(4) Briefings on high radiation area entry requirements were held for

, personnel with assigned dosimetry.

1 (5) All a)propriate Security personnel have been briefed on this' event. They have )een reminded of the procedural requirements for firewatch patrols, including entry requirements for high radiation areas.

Nuclear safety was not impacted by this event. The firewatch patrol of Room 7 was performed, although radiation protection requirements were not met. The radiological consequences were minimal due to the low dose rate and the short exposure time.

LER 89-05 also described an entry into a high radiation area without meeting entry requirements. LER's 87-26 and 88-01 described degraded access controls for very high radiation areas.

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NIC Fonn 308A 489)