ENS 54998

v t e ENS Event
04:00 Aug 26, 2020
Title	Part 21 Report - Failure of Air Conditioner Compressor Head Gasket
Event Description	The following is a synopsis of the information received from the supplier. On August 26, 2020, H. B. Robinson Generating Station, Unit 2 experienced a failure during post maintenance testing of a newly installed air conditioning compressor, which serves one of the Control Room HVAC units. Robinson plant contacted QualTech (the supplier) on September 22, 2020, detailing the findings of their investigation which indicated an incorrect head gasket had been installed, allowing high pressure gas to discharge to the low pressure side. QualTech NP reviewed the investigation and agrees, the incorrect gasket was installed. The root cause was determined to be an improper dedication plan of the gaskets, not recognizing the delta between the 'left' and 'right' head gaskets. QualTech has taken action to revise the dedication plan. This is the only compressor unit of this model sold. No other similar failures have been reported. QualTech believes this to be an isolated case. For further information contact: Tim Franchuk Quality Assurance Director QualTech NP, Curtiss-Wright Nuclear Division (513) 528-7900 x176

ENS 54998 +/-
Where
Qualtech Np Cincinnati, Ohio (NRC Region 3)
Organization:	Qualtech Np
Reporting

10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
Time - Person (Reporting Time:+1972.53 h82.189 days <br />11.741 weeks <br />2.702 months <br />)
Opened:	Tim Franchuk 09:32 Nov 16, 2020
NRC Officer:	Thomas Herrity
Last Updated:	Nov 16, 2020
54998 - NRC Website
v • d • e

v t e Emergency Notification System
Qualtech Np with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
WEEKMONTHYEAR2020-08-26T04:00:00 [Table view]
[ENS list for Qualtech Np]

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