ENS 45697

From kanterella

Jump to navigation Jump to search

v t e ENS Event
05:00 Feb 12, 2010
Title	Interim Report Concerning an Issue in Sump Blockage Generic Tests
Event Description	Westinghouse is evaluating an identified inconsistency between test assumptions and the test rig configurations used for Generic Safety Issue (GSI) 191, "Assessment of Debris Accumulation on PWR Sump Performance," testing. Specifically, this issue is related to jet impingement zone-of-influence (ZOI) tests and it applies to testing done for coatings and insulation. Prior to discovery of the inconsistency, Westinghouse provided letters to the utilities to summarize the testing, analyze the test results, and propose acceptable ZOIs to support resolution of the ZOI aspect of GSI-191. The ZOI tests assumed the smallest diameter in the nozzle producing the jet to be at the nozzle. Westinghouse discovered however, that the inner diameter of an upstream component was smaller than the nozzle. This inconsistency may have resulted in undersized ZOIs being proposed in the letters. Westinghouse has not yet concluded its determination as to whether there is a defect as defined by 10 CFR 21. Westinghouse has been working with the Pressurized Water Reactors Owners Group and the NRC NRR Safety Issues Resolution Branch to resolve general test protocol issues and establish methods to evaluate the test results in terms of ZOIs. * * UPDATE ON 2/16/2010 * * * Corrected the title of GSI-191 above and removed incorrect reference to NUREG/CR-6874 since it is not related to the Part 21.

ENS 45697 +/-
Where
Westinghouse Electric Company Pittsburgh, Pennsylvania (NRC Region 1)
Organization:	Westinghouse Electric Company
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+8.67 h0.361 days <br />0.0516 weeks <br />0.0119 months <br />)
Opened:	J.A. Gresham 13:40 Feb 12, 2010
NRC Officer:	Pete Snyder
Last Updated:	Feb 16, 2010
45697 - NRC Website
v • d • e

v t e Emergency Notification System
Westinghouse Electric Company with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2010-03-18T04:00:00 [Table view]
[ENS list for Westinghouse Electric Company]

Retrieved from "https://kanterella.com/w/index.php?title=ENS_45697&oldid=425414"

ENS Notification