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{{#Regex_clear:Honeywell, Metropolis Facil … {{#Regex_clear: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. </br>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. </br>MTW reverted to the previous design and all port reducers were collected for investigation.</br>The licensee notified NRC Region 2 (J. Pelchat). }}icensee notified NRC Region 2 (J. Pelchat). }} +
23:00:00, 22 February 2006 +
42,377 +
15:00:00, 28 February 2006 +
23:00:00, 22 February 2006 +
{{#Regex_clear:Honeywell, Metropolis Facil … {{#Regex_clear: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. </br>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. </br>MTW reverted to the previous design and all port reducers were collected for investigation.</br>The licensee notified NRC Region 2 (J. Pelchat). }}icensee notified NRC Region 2 (J. Pelchat). }} +
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00:00:00, 28 February 2006 +
SUB-526 +
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23:35:55, 24 November 2018 +
15:00:00, 28 February 2006 +
5.667 d (136 hours, 0.81 weeks, 0.186 months) +
23:00:00, 22 February 2006 +
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