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Resolution of Generic Safety Issues: Item A-39: Determination of Safety Relief Valve Pool Dynamic Loads and Temperature Limits (Rev. 1) (Rev. 3) ( NUREG-0933, Main Report with Supplements 1–35 )

DESCRIPTION

Operation of BWR primary system pressure relief valves can result in hydrodynamic loads on the suppression pool retaining structures or those structures located within the pool. These loads result from initial vent clearing of relief valve piping and steam quenching due to high local pool temperatures. The item addresses GE MARK I, II, and III containments and was originally identified in NUREG-03712 but was later determined to be a USI.

CONCLUSION

This USI was RESOLVED60 with the issuance of SRP11 Section 6.2.1.1.C. NUREG-0763,748 NUREG-0783,734 and NUREG-0802749 were also issued for Mark I, II, and III containments, respectively.

REFERENCES

0002.NUREG-0371, "Task Action Plans for Generic Activities (Category A)," U.S. Nuclear Regulatory Commission, November 1978.
0011. 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.
0060.NUREG-0606, "Unresolved Safety Issues Summary," U.S. Nuclear Regulatory Commission, Vol. 7 No. 3, August 1985.
0734. NUREG-0783, "Suppression Pool Temperature Limits for BWR Containments," U.S. Nuclear Regulatory Commission, November 1981.
0748.NUREG-0763, "Guidelines for Confirmatory Inplant Tests of Safety Relief Valve Discharges for BWR Plants," U.S. Nuclear Regulatory Commission, May 1981.
0749.NUREG-0802, "Safety/Relief Valve Quencher Loads: Evaluation for BWR Mark II and III Containments," U.S. Nuclear Regulatory Commission, October 1982.