ENS 46289

v t e ENS Event
04:00 Sep 29, 2010
Title	Potential Issues with Certain Regulator Model 77N-40 Air Regulators
Event Description	Dresser Masoneilan initiated a 10 CFR Part 21 investigation because of the failure of three (3) Air Regulators (model number 77N-40) at the PSE&G Salem Station within three months of being installed. Upon testing and evaluation, Dresser Masoneilan concluded that the internal O-ring used for pressure isolation in the Air Regulators were damaged during factory assembly contributing to the failure of the units to regulate pressure. Dresser Masoneilan has developed a corrective action plan and an in-service test method and acceptance criteria to determine if a unit is experiencing pressure loss due to the issue. Due to the volume, age and distribution of these models, Dresser Masoneilan is issuing a general notice to all utilities. Contact Bill Comeau of Dresser Masoneilan at (508) 941-5477 with any questions concerning this notification.

ENS 46289 +/-
Where
Dresser Masoneilan Avon, Massachusetts (NRC Region 1)
Organization:	Dresser Masoneilan
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+11 h0.458 days <br />0.0655 weeks <br />0.0151 months <br />)
Opened:	Frank Wheelright 15:00 Sep 29, 2010
NRC Officer:	Eric Simpson
Last Updated:	Sep 29, 2010
46289 - NRC Website
v • d • e

v t e Emergency Notification System
Dresser Masoneilan with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2010-09-29T04:00:00 [Table view]
[ENS list for Dresser Masoneilan]

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