ML18032A733

Radioactive Inoperable Effluent Instrumentation Rept.

ML18032A733
Person / Time
Site:	Browns Ferry
Issue date:	12/31/1987
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML18032A731	List: ML18032A730 ML18032A732 ML18032A733
References
NUDOCS 8803070005
Download: ML18032A733 (10)

Text

ENCLOSURE 2 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT RADIOACTIVE INOPERABLE EFFI UENT INSTRUMENTATION REPORT

.8803070005 PDR 88030 i aDOCK 05000259 R "-" DCD

Radioactive Inoperable Effluent Instrumentation

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Re ort This report is to comply with Radiological Effluent Technical Specifications (RETS) section 3.2.0.2 and 3.2.K.2 reporting requirements for instruments that are inoperable for more than 30 days. The RETS became effective at BFH on Nay 6, 1987. This report covers the period from July 1 Oecember 31, 1987.

Because of significant technical specification changes, a large number of radioactive effluent monitoring instruments became technically inoperable on Hay 6, 1987. RETS were incorporated during a BFN administrative outage. Site resources were and still are endeavoring to resolve previously identified 1

problem areas. llodifications required to bring BFH ef fluen monitoring equipment into technical compliance with RETS competes for resources with other regulatory driven modifications. This report explains why the t inoperability of The RHR RHR each instrument was not corrected instruments that were inoperable for more than service water monitor 1-90-133 service water monitor 1-90-13".

in a 30 days timely are:

manner.

RHR service water monitor 2-90-133 RHR service water monitor 2-90-134 RHR service water monitor 3-90-133 RHR service water monitor 3-90-134 Raw cooling water monitor 1-90-132 Raw cooling water monitor 2-90-132 Raw cooling water monitor 3-90-132 Liquid radwaste discharge monitor 0-90-130 Liquid radwaste discharge flow loop 77-60 Stack effluent monitor 90-147A 0592m

Stack ef f 1 uent moni tor 90-1 47B Building ventilation exhaust monitor 2-90-250 Building ventilation exhaust monitor 0-90-252 Posttreatment noble gas monitor 1-90-265 Posttreatment noble gas monitor 1-90-266 Posttreatment noble gas monitor 2-90-265 Posttreatment noble gas monitor 2-90-266 Posttreatment noble gas monitor '-90-265 Posttreatment noble gas monitor 3-90-266 Ouring the entire reporting period fuel was off loaded from all three units and all compensatory sampling requirements were met.

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Li uid Process Radiation Monitors BFN RETS Table 3.2.0 requires RHR Service Mater Monitors (1-90-133, 1-90-134, 2-90-133, 2-90-134, 3-90-133, and 3-90-134) and Raw Cooling Mater Monitors (1-90-132, 2-90-132, and 3-90-132) to be operable when these systems are in service. Contrary to this requirement, these nine monitors k

were inoperable during the entire reporting period.

These monitors were declared inoperable because they were not designed to meet the requi rements in RETS Tab 1 e 4.2. 0 Footnote 2. Thi s footnote requi res that control room annunciation occur if 'instrument controls are not set in operate mode. Oesign Change Request 1687, revision 1, was written to correct this la problem and was approved on September 29, 1986. Engineering Change Notices (ECNs) P0976 (Unit 1), P0977 (Unit 2), and P0978 (Unit 3) were approved on January 4, 1988 after resolving various design problems.

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Li uid Radwaste Effluent Instrumentation BFN RETS Table 3.2.0 requires the liquid radwaste effluent monitor (90-130) and flow rate loop (77-60) to be operable during liquid radwaste releases.

Contrary to this requirement, these two instruments were technically inoperable-during the entire reporting period.

The liquid radwaste effluent monitor was declared technically inoperable because it was not designed to meet the requirements in RETS Table 4.2.0 Footnote 1. Footnote 1 requires automatic isolation to occur if the instrument encounters an inoperative/downscale failure. The monitor was, however, in service and would have alarmed causing operator action to

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terminate release. Additionally, the required supplemental sampling requirements were performed. OCR 34l7 Rl was written to correct this problem and was approved on February 6, 1987. ECH 5523 was issued June 18, 1987 and this modification has been completed in the field. Some delays were encountered while writing the post modification test. The flow rate loop was declared technically inoperable because Surveillance instructions (SIs) to meet the channel calibration and func-.ional test requirements wel e not wl ltten and performed.

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Stack Radioactive Effluent Instrumentation The stack effluent noble gas monitors (90-147A and 8) and the stack flow meter (90-271) were inoperable during this reporting period. BFH RETS Table 4.2.K Footnote 1 requires that stack noble gas monitors (90-147A and 8) be calibrated using National Bureau of Standards (HBS) traceable radioactive standards. HBS traceable calibrations were completed on April 13, 1987.

However, upgraded Surveillance Instructions (SIs) incorporating the new calibration results were delayed in being approved due to new procedure format and walkdown requirements.

The stack flow meter is also inoperable because calibration and functional SIs have not been performed. Fuel was off-loaded for all three units and no fuel movements occurred during this period. Results of compensatory lab analyses of stack effluent indicated no anomolies.

All applicable surveillance instructions have been approved.

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Bui 1 din Venti 1 ati on Exhaust Monitors BFN RETS Table 3.2.K requires reactor/turbine building

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ventilation monitors (1-90-250, 2-90-250, and 3-90-250) and the radwaste building vent monitor

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(0-90-252) to be operable at all times and the turbine building exhaust monitors (1-90-249, 1-90-251, 2-90-249, 2-90-251, 3-90-249, and 3-90-251) to be operable during releases via this pathway. Contrary to this requi rements, two monitors (2-90-250 and 0-90-252) were not operable for over 30 days. Fuel was off-loaded for all three vessels and no fuel handling occurred during the period of inoperability. Compensatory lab analyses indicated no detectable noble gas activity in ventilation releases.

The two monitors were inoperable due to sample pump maintenance problems.

0-90-252 was placed back in service on October 30, 1987 and 2-90-250 was placed in service on November 3, 1987.

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Of f as Posttreatment BFH RETS Table 3.2. K requires the of f gas posttreatment noble gas monitors (1-90-265, 1-90-266, 2-90-265, 2-90-266, 3-90-265, and 3-90-266) to

~ ~ be operable at all times. ~ Table 4.2.K requires performance of functional tests

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and channel calibrations for these radiation monitors. Contrary to the requirements of Table 4.2.K functional tests and channel calibrations have not been performed and the instruments were taken out of service.

Approval of upgraded surveillance ins ructions for these monitors was delayed due to format and walkdown requirements. In addition to procedure problems, sample pump problems have also been encountered. Additional procedure changes need to be approved before the monitors can be returned to service.

q4 The offgas systems were not in service during this period.

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