ENS 40678

v t e ENS Event
05:00 Apr 16, 2004
Title	Part 21 Notification Due to Potential Cracking in B4C Hydrid Control Rods
Event Description	This issue concerns the potential for cracking in the tips of the Westinghouse designed B4C Hybrid Rod Cluster Control Assembly (RCCA) while in operation. Westinghouse supplied B4C Hybrid RCCAs are currently in use in the U.S. only at Tennessee Valley Authority's (TVA) Watts Bar Nuclear Plant. Cracks in the hybrid RCCAs could result in a potential loss of B4C [a neutron absorber] from the RCCA if left uncorrected. Westinghouse will review and revise its guidelines on the use and expected life of B4C Hybrid RCCAs to assure that this information is accurately reflected and communicated to its customers.

ENS 40678 +/-
Where
Westinghouse Nuclear Services (NRC Region)
Organization:	Westinghouse Nuclear Services
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+5.23 h0.218 days <br />0.0311 weeks <br />0.00716 months <br />)
Opened:	Jim Gresham 10:14 Apr 16, 2004
NRC Officer:	Howie Crouch
Last Updated:	Apr 16, 2004
40678 - NRC Website
v • d • e

v t e Emergency Notification System
Westinghouse Nuclear Services with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2004-04-16T05:00:00 [Table view]
[ENS list for Westinghouse Nuclear Services]

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