Issue 20: Effects of Electromagnetic Pulse on Nuclear Power Plants
DESCRIPTION
Historical Background
This concern was raised[1]because of the potential for a high-altitude nuclear weapon detonati
Issue 19: Safety Implications of Nonsafety Instrument and Control Power Supply Bus
DESCRIPTION
On November 10, 1979, an event occurred at the Oconee Power Station, Unit 3, that resulted in loss of power to a non-Class 1E 120-volt AC single-phase po
Issue 18: Steam Line Break with Consequential Small LOCA
DESCRIPTION
Historical Background
This issue effects all PWR-type reactors (Westinghouse, CE, B&W).
Issue 17: Loss of Offsite Power Subsequent to a LOCA
DESCRIPTION
Historical Background
In the event of a LOCA in which offsite power remains available, the reactor operator may choose to shut down the emergency
Issue 16: BWR Main Steam Isolation Valve Leakage Control Systems
DESCRIPTION
This issue involves a potential deficiency in the ability to control leakage past the main steam isolation valves
Issue 15: Radiation Effects on Reactor Vessel Supports
DESCRIPTION
Historical Background
This issue addressed the potential problem of radiation embrittlement of reactor vessel support structures
Issue 14: PWR Pipe Cracks
DESCRIPTION
Historical Background
Cracking has occurred in PWR piping systems as a result of stress corrosion, vibratory and thermal fatigue, and dynamic loa
Issue 13: Small-Break LOCA from Extended Overheating of Pressurizer Heaters
DESCRIPTION
Historical Background
This is an ACRS concern raised by the Subcommittee on TMI-2 Implications in October 1979.
Issue 11: Turbine Disc Cracking
DESCRIPTION
This issue which is identified in NUREG-0705[1]was raised because of the discovery of stress corrosion cracking in the low p