05000458/LER-1987-001, Corrected LER 87-001-00:on 870108,discovered That Main Plant & Fuel Bldg Exhaust Radiation Monitor Particulate & Iodine Samplers Isolated Since 870107.Caused by Operator Error. Operator Aid Issued

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Corrected LER 87-001-00:on 870108,discovered That Main Plant & Fuel Bldg Exhaust Radiation Monitor Particulate & Iodine Samplers Isolated Since 870107.Caused by Operator Error. Operator Aid Issued
ML20212P563
Person / Time
Site: River Bend Entergy icon.png
Issue date: 02/09/1987
From: Booker J, Grant E
GULF STATES UTILITIES CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-87-001-ERR, LER-87-1-ERR, RBG-25320, NUDOCS 8703160153
Download: ML20212P563 (3)
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LER-2087-001, Corrected LER 87-001-00:on 870108,discovered That Main Plant & Fuel Bldg Exhaust Radiation Monitor Particulate & Iodine Samplers Isolated Since 870107.Caused by Operator Error. Operator Aid Issued
Event date:
Report date:
4582087001R00 - NRC Website
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text

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During_the Chemistry Department's routine inspection of plant radiation monitors, it was discovered at 0820 on 1/8/87, with the unit in full power operation, that the Main Flant Exhaust radiation monitor (RMS-RE125) particulate and iodine sampler was isolated. At 1220 on 1/8/87 it was discovered that the Fuel Building Exhaust radiation monitor (RMS-RESA) particulate and iodine sampler was also isolated.

Per Technical Specification Table 3.3.7.11-1 items 2.b and 2.c, the requirement to continuously monitor the exhaust ventilation systems for particulate and iodine activity was not met within the 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> allowed by the Action Statement. Upon discovery, the sample flows l were immediately restored to the sampler. Investigation determined that the root cause was due to the operator failing to notify the Chemistry Department prior to changing the sample alignments.

Safe operation'of the plant and the health and safety of the public were not affected as a result of this event. During the time the samples were not being collected there were no inadvertent releases to the environment. Additionally, there is no spent fuel stored in the Fuel Building at this time.

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nl0 0l2 or 0 l2 rtxt m .M . - -  :=ac s asse. m n REPORTED CONDITION During the Chemistry Department's routine inspection of plant radiation monitors, it was discovered at 0820 on 1/8/87, with the unit in full power operation, that the Main Plant Exhaust radiation monitor .

(RMS-RE125) particulate and iodine sampler was isolated. At 1220 on  !

1/8/87 it was discovered that the Fuel Building Exhaust radiation i monitor (RMS-RESA) particulate and iodine sampler was also isolated. i Per Technical Specification Table 3.3.7.11-1 items 2.b and 2.c, the I requirement to continuously monitor the exhaust ventilation systems for particulate and iodine activity was not met within the 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> allowed by the Action Statement. Upon discovery, the sample flows were immediately restored to the sampler.

A similar event of a missed sample due to improper sample lineup was reported in LER 86-046.

INVESTIGATION r i

i During the investigation of the event it was determined that on 1/7/87 j at 2055 the Main Plant Exhaust radiation monitor (RMS-RE125) was remotely realigned to clear a " Loss of Isokinetic Control" alarm to an alternate sample path such that the particulate and iodine sampler was inadvertently isolated. Later that day at 2300 the Fuel Building ,

Exhaust radiation monitor (RMS-RESA) was similarly remotely realigned to clear a " Loss of Process Flow" alarm. On each of these occasions the operator failed to notify the Chemistry Department of the sample alignment change.  ;

CORRECTIVE ACTION Immediate action was taken to issue an " operator aid" which was attached to the front of each Digital Radiation Monitoring System (DRMS) monitor with a sample selection function switchable from the 1 Main Control Room. The operator aid states specific instructions for I

notifying the Chemistry Department prior to switching sample i alignment.

1 Additionally, a memorandum was issued by the Operations Supervisor to all Operations Section personnel noting the requirement to notify the Chemistry Department prior to changing sample alignments.

l l SAFETY ASSESSMENT l

There was no impact on the safe operation of the plant or to the I health and safety of the public. During the time that the samples

! were not collected for particulate and iodines there were no I

inadvertent releases to the environment. Additionally, there is no spent fuel stored in the Fuel Building at this time.

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. * - Corrected Copy p

e GULF STATES UTILITIES COMPANY RIVER BEND STATION POST OFFICE BOX 220 ST FRANCISVILLE. LOUISIANA 70775 AAE A CODE 504 635-6094 346 8651 February 9, 1987 RBG- 2 5 3 2 0 File Nos. G9.5, G9.25.1.3 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D. C. 20555

Dear Sir:

River Bend Station - Unit 1 Docket No. 50-458 Please find enclosed Licensee Event Report No.87-001 for River Bend Station - Unit 1. This report is being submitted pursuant to 10CFR50.73.

Sincerely, (N(  %^~

J. E. Booker Manager-River Bend Oversight River Bend Nuclear Group JEB/TFP/PDG/DAS/je cc: U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, TX 76011 INPO Records Center 1100 Circle 75 Parkway Atlanta, GA 30339-3064 NRC Resident Inspector P.O. Box 1051 St. Francisville, LA 70775

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