Document: NUREG-0800
Document ID: 919b8fa0-8b11-41bd-9694-2c62120b843b
Document Type: srp
Title: Revision 7 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0636/ML063600403.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6
CFR Part: 
CFR Title: 

Content:
on loads on submerged components during pool swell. ---- III.B.3.a.4 (1a) e) Wetwell Air Compression Wetwell air compression is calculated by PSAM consistent with maximum pool swell elevation in B.1.b above. ---- II.A.2 (1b) Table B-1 Mark II LOCA-related hydrodynamic loads Summary table Load or phenomenon Load specification Load specification clarifying footnotes NRC Evaluation (Foot-note) 6.2.1.1.C-20 Revision 7 - March 2007 f) Drywell Pressure Methods of NEDM- 10320 and NEDO- 20533 Appendix B. Utilized in PSAM to calculate pool swell loads. ---- III.B.3.a.6 (1a) 2. Loads on Submerged Boundaries Maximum bubble pressure predicted by the PSAM added uniformly to local hydrostatic below vent exit (walls and basemat) linear attenuation to pool surface. Applied to walls up to a maximum pool swell elevation. ---- III.B.3.b (1a) 3. Impact Loads a) Small Structures 1.35 x Pressure- Velocity correlation for pipes and I beams based on PSTF impulse data and flat pool assumption. Variable pulse duration. Note 3 III.B.3.c.1 (1a) b) Large Structures None - Plant unique load where applicable. ---- III.B.3.c.6 (1a) c) Grating P drag vs. grating area correlation and pool velocity vs. elevation. Pool velocity from the PSAM. P drag multiplied by dynamic load factor. Note 2 III.B.3.c.3 (1a) Table B-1 Mark II LOCA-related hydrodynamic loads Summary table Load or phenomenon Load specification Load specification clarifying footnotes NRC Evaluation (Foot-note) 6.2.1.1.C-21 Revision 7 - March 2007 4. Wetwell Air Compression a) Wall Loads Direct application of the PSAM calculated pressure due to wetwell compression. ---- III.B.3.d.1 (1a) b) Diaphragm Upward Loads 5.5 psid for diaphragm loadings only. ---- 2.1.2.7 (1c) 5. Asymmetric LOCA Pool Use 20% of maximum bubble pressure statistically applied to one-half of the submerged boundary. This load is to be applied statically together with normal hydrostatic pressure to the submerged portion of the containment. ---- II.A.3 (1b) C. Steam