Information Notice No. 87-44, Supplement 1: Thimble Tube Thinning in Westinghouse Reactors
UNITED STATES
NUCLEAR REGULATORY COMMISSION
OFFICE OF NUCLEAR REACTOR REGULATION
WASHINGTON, D.C. 20555
March 28, 1988
Information Notice No. 87-44, SUPPLEMENT 1: THIMBLE TUBE THINNING IN
WESTINGHOUSE REACTORS
Addressees:
All holders of operating licenses or construction permits for nuclear power
reactors that employ a Westinghouse nuclear steam supply system (NSSS).
Purpose:
This notice is provided as a supplement to Information Notice No. 87-44 to
alert recipients of additional information regarding thinning of the incore
neutron monitoring system thimble tubes. It is expected that recipients will
review the information for applicability to their facilities and consider
actions, as appropriate, to avoid similar problems. However, suggestions
contained in this information notice do not constitute NRC requirements;
IN 87-44
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