05000302/LER-1980-036-03, /03L-1:on 800827,DHV-111 Decay Heat Pump B Discharge Throttle Valve Would Not Flow in Automatic During Operability of Boron Injection Sources & Pumps Test SP-320. Caused by Air in Sensing Line.Sensing Line Vented & Checked

/03L-1:on 800827,DHV-111 Decay Heat Pump B Discharge Throttle Valve Would Not Flow in Automatic During Operability of Boron Injection Sources & Pumps Test SP-320. Caused by Air in Sensing Line.Sensing Line Vented & Checked

ML19347D419
Person / Time
Site:	Crystal River
Issue date:	03/10/1981
From:	Hernandez V FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19347D416	List:
References
LER-80-036-03L, LER-80-36-3L, NUDOCS 8103170576
Download: ML19347D419 (2)

LER-1980-036, /03L-1:on 800827,DHV-111 Decay Heat Pump B Discharge Throttle Valve Would Not Flow in Automatic During Operability of Boron Injection Sources & Pumps Test SP-320. Caused by Air in Sensing Line.Sensing Line Vented & Checked

Event date:
Report date:
3021980036R03 - NRC Website

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,,,,,i control; Decay Heat Loop "A" provided redundancy. There was no effect upon the e a.., I general public health or safety. This is the first event of this type, and the

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SUPOLEMENTARY INFORMATION Report No.:

50-302/80-036/03L-1 Facility:

Crystal River Unit 3 Report Date:

March 10, 1981 Occurrence Date:

27 August 1980 Identification of Occurrence:

Failure to aave two (2) independent ECCS subsystems cperable contrary to Technical Specification 3.5.2.

Conditions Prior to Occurrence:

Mode 1 power operation (80%).

Description of Occurrence:

At 0300 during performance of SP-320, Operability of Boron Injection Sources and Pumps, it was discovered that DHV-lll "B" Decay Heat Pump Discharge Throttle Valve would not con-trol flow in automatic. DHV-lli did respond in manual control; maintenance actions were initiated.

Designation of Apparent Cause:

The cause is attributed to air in the sensing lines.

Analysis of Occurrence:

There was no effect upon the general public health and safety.

Redundancy was maintained by the "A" Decay Heat Loop.

Corrective Action

The sensing lines were vented and a functional check was com-pleted. The line was vented prior to surveillance checks for three months; it will be vented monthly until a permanent corrective action is implemented. An engineering evalcation of the control system for DHV-lli and DHV-110 is currently in prog ress.

(Reference REI 80-9-3). This revision corrects cause and corrective action of Revision 0.

Failure Data:

This is the first occurrence for DHV-lll, and the tenth report made under this Specification.

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