Item C-2: Study of Containment Depressurization by Inadvertent Spray Operation to Determine Adequacy of Containment External Design Pressu

DESCRIPTION

Inadvertent operation of containment sprays can result in a rapid depressurization of the containment building. Where containment external design pressure may be exceeded, many plants have been provided with vacuum breakers or control system interlocks to prevent the containment external design pressure from being exceeded. The depressurization of the containment is a transient behavior and can take place in a short time period. This NUREG-0471[1]task involves the development of a code to be used for the analysis of containment pressure response (both with and without the effects of vacuum breakers or control systems) for the inadvertent spray accident.

CONCLUSION

Licensees are required to perform analyses of containment depressurization due to inadvertent spray

operation.[2]These analyses are reviewed by the NRC in accordance with SRP[3]Section 6.2.1.1. Thus, this item has been RESOLVED.

[1] NUREG-0471, "Generic Task Problem Descriptions (Categories B, C, and D)," U.S. Nuclear Regulatory Commission, June 1978.

[2] Memorandum for T. Speis from J. Funches, "Prioritization of Generic IssuesEnvironmental and Licensing Improvements," February 24, 1983. [8303090540]

[3]NUREG-0800, "Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants," U.S. Nuclear Regulatory Commission, (1st Ed.) November 1975, (2nd Ed.) March 1980, (3rd Ed.) July 1981.