Ultrasonic reinspection of Pilgrim-I reactor vessel nozzle N2B

Technical Report · Tue Jun 01 04:00:00 EDT 1976

OSTI ID:7355482

Gieske, J H

Boston Edison Company provided NRC with ultrasonic test data from the periodic inspections of Pilgrim I carried out in 1974 and again in 1976. The ultrasonic test data specifically concerned the recirculation inlet nozzle N2B which contained a flaw in the seven-inch thick weldment joining the nozzle to the pressure vessel. This ultrasonic test data was used to plot the dimensions of the flaw within the wall, to draw conclusions on any flaw growth, to determine 50 percent DAC dimensions, and to deduce the most conservative or largest possible flaw size. This work was done on a consulting basis for the Division of Operating Reactors/Office of Nuclear Reactor Regulation of NRC at their request.

• Research Organization: Sandia Labs., Albuquerque, N.Mex. (USA)
• DOE Contract Number: AT(29-1)-789
• OSTI ID: 7355482
• Report Number(s): SAND-76-0241; NUREG-6502
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210100* -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
ACOUSTIC TESTING
BWR TYPE REACTORS
CONTAINERS
DEFECTS
ENRICHED URANIUM REACTORS
MATERIALS TESTING
NONDESTRUCTIVE TESTING
NOZZLES
PILGRIM-1 REACTOR
POWER REACTORS
PRESSURE VESSELS
REACTORS
TESTING
THERMAL REACTORS
ULTRASONIC TESTING
WATER COOLED REACTORS
WATER MODERATED REACTORS