Issue 129: Valve Interlocks to Prevent Vessel Drainage During Shutdown Cooling
DESCRIPTION
Historical Background
This issue was identified in a May 1986 DSI memorandum[1]in which 21 in
Issue 128: Electrical Power Reliability
DESCRIPTION
Following the NRR reorganization in November 1985, EIB/DSRO was responsible for resolving three issues that were directly related to onsite electrical sy
Issue 127: Maintenance and Testing of Manual Valves in Safety-Related Systems
DESCRIPTION
Historical Background
This issue was identified in the U.S.
Issue 126: Reliability of PWR Main Steam Safety Valves
DESCRIPTION
Background
The reliability of PWR main steam safety valves (MSSVs) was identified as a generic issue in a DSRO
Issue 125: Davis-Besse Loss of All Feedwater Event of June 9, 1985: Long-Term Actions: Availability of the Shift Technical Advisor
On June 9, 1985, Davis-Besse had a partial loss of feedwater while operating at 90% power. Following a reactor trip, the loss of all feedwater occurred.
Issue 124: Auxiliary Feedwater System Reliability
DESCRIPTION
In 1985, operating experience as well as staff and industry studies indicated that AFW systems continued to fail at a high rate. These studies also indic
Issue 123: Deficiencies in the Regulations Governing DBA and Single-Failure Criteria Suggested by the Davis-Besse Event of June 9, 1985
DESCRIPTION
Following the Davis-Besse event in June 1985, potential inadequacies of nuclear power plant design criteria and safety analyses were raised in a DST/NRR
Issue 122: Davis-Besse Loss of All Feedwater Event of June 9, 1985: Short-Term Actions: Potential Inability to Remove Reactor Decay Heat: F
DESCRIPTION
The loss of all feedwater event at Davis-Besse on June 9, 1985, resulted in the formation of an NRC project
Issue 121: Hydrogen Control for Large, Dry PWR Containments
DESCRIPTION
In December 1984, the staff recommended in SECY-83-357B[1]that rulemaking with regard to H