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Issue 139: Thinning of Carbon Steel Piping in LWRs

DESCRIPTION

Historical Background

This issue was raised[1]as a result of a pipe rupture in the main feedwater (MFW) system at

Issue 138: Deinerting of BWR Mark I and II Containments During Power Operations Upon Discovery of RCS Leakage or a Train of a Safety System

DESCRIPTION

Historical Background

The issue of deinerting upon discovery of RCS leakage was identified[1]by DL/NRR, based on d

Issue 137: Refueling Cavity Seal Failure

DESCRIPTION

Historical Background

On August 21, 1984, the Haddam Neck plant experienced failure of a refueling cavity seal during preparations for refueling.

Issue 136: Storage and Use of Large Quantities of Cryogenic Combustibles On Site

DESCRIPTION

Historical Background

This issue was identified by NRR/EIB in February 1986 when it was suggested that Issue 106, "Piping and the Use of Highly Combustible Gases in Vital Are

Issue 135: Steam Generator and Steam Line Overfill

DESCRIPTION

Steam generator overfill and its consequences have received staff and industry attention because of the frequency and severity of overfill events.

Issue 134: Rule on Degree and Experience Requirement

DESCRIPTION

Since the TMI-2 accident in March 1979, to which human error was a major contributor, the issue of academic requirements for reactor operators has been a major concern of the NRC.