United States Nuclear Regulatory Commission - Protecting People and the Environment

LICENSEE: VERMONT YANKEE NUCLEAR POWER CORP.
SITE: VERMONT YANKEE 1 EVENT NOTIFICATION NUMBER: 38408
DOCKET: 05000271 EVENT DATE: 10/19/2001
RX TYPE: BWR EVENT TIME:
VENDOR: GE-4 NOTIFICATION DATE: 10/19/2001
EMERGENCY CLASS: N/A REGION: 1 STATE: VT TIME: 16:39
HQ OPS OFFICER: BOB STRANSKY
10 CFR SECTION: CCCC UNSPECIFIED PARAGRAPH
UNIT  SCRAM  RX  INIT  INTIAL MODE     CURR CURRENT MODE
CODE CRIT PWR                    PWR
1    N      Y  100  Power Operation  100  Power Operation

10 CFR PART 21 REPORT

"During RFO-22, Carboline Carbozine CX-11SG paint primer was applied to the drywell shell (inner wall) to the floor joint as part of a qualified seal design. The purpose of this seal is to provide a moisture barrier to mitigate water entering the shell to concrete interface. In preparation for and during subsequent applications of the primer, significant gelling/premature set-up of the paint was exhibited (ref. ER20011169, dated 5/11/01). Within 24 hours of the paint application, the paint began to lift and blister. This paint was supplied under an Appendix B Vendor QA Program in accordance with VY PO 011040. Failure analysis received from Carboline and an independent test lab indicated the paint was defective. Carboline indicates the failure was most likely due to a moisture problem during manufacture. The problem was with part 'A' of the two-part paint. The impact of the failed paint applied in the drywell during the outage was evaluated under ER 20011169. The seal was then coated with a single coat of Carboline 890. Carboline Corporation has verified this to be an acceptable application until a permanent remedy is achieved."

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