ML20040A051
| ML20040A051 | |
| Person / Time | |
|---|---|
| Site: | 05000561 |
| Issue date: | 10/01/1976 |
| From: | Cox T Office of Nuclear Reactor Regulation |
| To: | Happell J BABCOCK & WILCOX CO. |
| Shared Package | |
| ML111090060 | List:
|
| References | |
| FOIA-80-515, FOIA-80-555 NUDOCS 8201200264 | |
| Download: ML20040A051 (2) | |
Text
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B-SAR-205 Supplemental Questions N
222.15 This question relates to the double ended hot leg rupture adjacent to the steam generator inlet nozzle which you have analyzed in Appendix 6A. This analysis assumes that during the reflooding period 80% of the fluid which enters the core is ejected from the break. We believe that the carry out fraction may be less than 80% and that separation of the entrained liquid may occur in the upper plenum and the section of hot leg piping leading to the break.
If less liquid is ejected from the break the time to reflood will be less and the time when ECCS water WIiB first enters the g
steam generatorswill be earlier. Demonstrate the sensitivity of reduced liquid entrainment from the break during the reflooding period on the containment pressure by performing an analysis assuming zero liquid entrainment. Pyo u /d e ea5 5 gmd em tw$y
're I PA $ G d e 10 a 222.16 Tables 6A.5-5, 6A.5-7 and 6A.5-9 appear to be inconsistent.
These tables provide energy balance data for the three break locations, Correct or justify these apparent inconsistencies.
a.) The core heat generation should be zero BTU's at time zero instead of the finite values indicated in the table.
b.) The initial steam generator energy is different fo.r each table. The final equilibrium values also differ in the three tables.
i c.) The times given for E08 (end of reflood)do not correspond to the values on page 6A-4.
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-515 PDR
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