Resolution of Generic Safety Issues: Item C-10: Effective Operation of Containment Sprays in a LOCA ( NUREG-0933, Main Report with Supplements 1–34 )
This NUREG-04713 task will respond to a concern of the ACRS about the effectiveness of various containment sprays to remove airborne radioactive materials which could be present within the containment following a LOCA. This concern has been expanded to include the possible damage to equipment located inside containment due to an inadvertent actuation of the sprays.
This task involves assisting the industry in writing an ANSI Standard on the design of containment spray systems, developing a topical report on the technological bases for spray washout models, and in managing contracts to evaluate the ability of different spray solutions to remove the radioiodines and radioactive particulates released to containment during a postulated LOCA.
Draft 7 of ANSI N581, "BWR and PWR Containment Spray System Design," has been reviewed by the staff. Following resolution of the NRC comments and issuance of this standard by ANSI, a regulatory guide endorsing this standard will be developed.