ENS 42377

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v t e ENS Event
23:00 Feb 22, 2006
Title	Part 21 Notification - Defect in a Port Reducer
Event Description	{{#Wiki_filter:Honeywell, Metropolis Facility (MTW) mechanics were installing a new BS&B manufactured rupture disc, corresponding safety head, and port reducer on the inlet of the relief valve on the Alternate Primary Cold Trap, E-600. The disc and head were part of an approved change. The safety heads (disc holders) have a port between the disc and relief valve to install a tell-tale indicator. This safety head was for a 1-1/2 in. disc. The normal port size of � in. pipe (normal O.D. = 0.84 in.) was reduced to � in. pipe (normal O.D. = 0.54 in.) to allow clearance between the safety head fasteners and the companion flange studs. To facilitate the site requirements of � in. pipe size and the clearance needs of the manufacturer, the port reducer was fabricated from a single piece of metal, in this case Monel. MTW had already welded a � in. Hex valve to the port and the mechanics had installed the head / disc / port reducer / valve assembly onto the piping. As the tell-tale gauge was installed, the port reducer broke into two pieces. The break was at the machined reduction in the outer diameter. On inspection a fabrication flaw was found in the port reducer. The large end of the port reducer has an I.D. of 0.55 inches and the small end has an O.D. of 0.54 inches, machined down from the O.D. of 0.84 at the large end. The small O.D. section was specified to be 2.00 inches long. It was improperly machined approximately 2.63 inches long so that the 0.55 I.D. came within a very small distance of the 0.54 O.D. When the gauge was being hand tightened, the port reducer broke at this thin wall point. MTW reverted to the previous design and all port reducers were collected for investigation. The licensee notified NRC Region 2 (J. Pelchat). }}

ENS 42377 +/-
Where
Honeywell International, Inc. Metropolis, Illinois (NRC Region 2)
License number:	SUB-526
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+136 h5.667 days <br />0.81 weeks <br />0.186 months <br />)
Opened:	James Tortorelli 15:00 Feb 28, 2006
NRC Officer:	Mike Ripley
Last Updated:	Feb 28, 2006
42377 - NRC Website
v • d • e

v t e Emergency Notification System
Honeywell International, Inc. with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2006-02-22T23:00:00 [Table view]
[ENS list for Honeywell International, Inc.]

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