05000327/LER-1980-006-01, /01T-0:on 800314,w/essential Raw Cooling Water Radiation Monitors on Train a Inoperable,Personnel Determined That Limiting Condition of Operation Requires Sampling.Caused by Misinterpretation of Tech Specs

/01T-0:on 800314,w/essential Raw Cooling Water Radiation Monitors on Train a Inoperable,Personnel Determined That Limiting Condition of Operation Requires Sampling.Caused by Misinterpretation of Tech Specs

ML19309A811
Person / Time
Site:	Sequoyah
Issue date:	03/27/1980
From:	Record D TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19309A800	List: 05000327/LER-1980-006, Forwards LER 80-006/01T-0 05000327/LER-1980-006-01, /01T-0:on 800314,w/essential Raw Cooling Water Radiation Monitors on Train a Inoperable,Personnel Determined That Limiting Condition of Operation Requires Sampling.Caused by Misinterpretation of Tech Specs
References
LER-80-006-01T, LER-80-6-1T, NUDOCS 8004010371
Download: ML19309A811 (2)

LER-1980-006, /01T-0:on 800314,w/essential Raw Cooling Water Radiation Monitors on Train a Inoperable,Personnel Determined That Limiting Condition of Operation Requires Sampling.Caused by Misinterpretation of Tech Specs

Event date:
Report date:
3271980006R01 - NRC Website

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At 0840 CST on 3/13/80, essential raw <.ooling water radiation monitors

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radiation monitors are operable. SI 414 was immedintely initiated.

All effluent releases occurring during the period of ERCW radiation

monitor inoperability were monitored by Cooling Tower Blowdown Radiation j i Monitor. No unmonitored releases were made.

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,'. Technical Specification.3.3.3.9, Table 3.3-12 states,only,one radiation

! ;j[ monitor is required. Radiation monitors were operable on B train ERCW r,*

j but thi,s did not satisfy T.S.

One radiation monitor per ERCW effluent

~~i'.. path 1,s required..All ne_cessary personnel reinstructed as to correct l,

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Sequoyah Nuclser Plcnt LER SUPPLEMENTAL INFORMATION SQRO-40-327/8006 Technical Specification Involved 3.3.3.9 Reported Under Technical Specification 6.9.1.12.b Date of Occurrence: 3/14/80 Time of Occurrence: 0300 CST Unit i Identification and Description of Occurrence:

At 0840 CST 3/13/80, power vns removed from Containment Building Lower Compartment Radiation Monitor (1-RM-90-106) for maintenance. This action also removed power from Essential Row Cooling Water Radiation Monitors (1-RM-90-133 and 140) on A header. Two radiation monitors on E header (1-RM-90-134 and 141) remained operable. This was determined to satisfy LCO 3.3.3.9, Table 3.3-12.

At 0300 CST 3/14/80, it was determined LCO 3.3.3.9, Table 3.3-12 was not correctly interpreted. Sampling of ERCW header A was initiated immediately per ACTION 29 of Table 3.3-12 of LCO 3.3.3.9.

All effluent releases occurring during the period of ERCW radiation sonitor inoperability were monitored by the Cooling Tower Blow-down Radiation Monitor (0-RM-90-211). No unmonitored releases were made.

Conditions Prior to Occurrence:

Unit 1 in Mode 6.

Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment. Describe.

N/A Apparent Cause of Occurrence:

Hisunderstanding of Technical Specification requiremente.

Analysis of Occurrence:

There was no hazard to the public health or safety.

Corrective Action

All necessary personnel reinstructed as to applicable Technical Specification requirements.

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