Document: NUREG-0800
Document ID: 545a669a-51a1-4b1f-9d90-78ee08ca0845
Document Type: srp
Title: COMBUSTIBLE GAS CONTROL IN CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070463.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.5
CFR Part: 
CFR Title: 

Content:
required input information. All data associated with the power decay profile have been incorporated into the program and need not be entered. The major input requirements are: 1. Reactor power level, Mwt. 2. Containment free volume, ft (0.02832 m ) . 3 3 76 3. Second containment free volume, (wetwell), ft (0.02832 m ) . 3 3 77 4. Zirconium cladding weight, pounds (0.4536 kilograms) . 78 5. Oxygen dissolved in primary, pound-moles (0.4536 kg-moles) . 79 6. Hydrogen dissolved in primary, pound-moles (0.4536 kg-moles) . 80 7. Initial containment pressure, psia (6.8948 kPa) . 81 8. Initial containment temperature, Rankine (0.55556 Kelvin) . 82 9. Initial oxygen volume fraction (.209). 10. Recombiner flow rate, cfm (472 x 10 m /s) -6 3 83 11. Time recombiner is started, days. 12. Purge rate, cfm (472 x 10 m /s) . -6 3 84 13. Zirc-water reaction fraction. 14. Aluminum surface area, ft (0.09290 m ) . 2 2 85 15. G-H(2), core solution, mole/100 ev. 16. G-H(2), sump solution, mole/100 ev. 17. Fraction of gammas absorbed in coolant in core region. 18. Fraction of, solid fission product energy absorbed in solution outside core. 19. Fraction of iodine fission product energy absorbed in solution outside core. 20. Time constant, 9.0 x 10 . 8 DRAFT Rev. 3 - April 1996 6.2.5-22 21. H concentration fraction at which purging will begin. 2 22. Time to initiate nitrogen addition, sec. 23. CAD nitrogen flow rate, scf/sec (472 x 10 m /s) . -6 3 86 6.2.5-23 DRAFT Rev. 3 - April 1996 BRANCH TECHNICAL POSITION CSB 6-2 CONTROL OF COMBUSTIBLE GAS CONCENTRATIONS IN CONTAINMENT FOLLOWING A LOSS-OF-COOLANT ACCIDENT (BTP CSB 6-2 has been superseded by Regulatory Guide 1.7.)87 DRAFT Rev. 3 - April 1996 6.2.5-24 [This Page Intentionally Left Blank] SRP Draft Section 6.2.5 Attachment A - Proposed Changes in Order of Occurrence 6.2.5-25 DRAFT Rev. 3 - April 1996 Item numbers in the following table correspond to superscript numbers in the redline/strikeout copy of the draft SRP section. Item Source