ML19220C948
| ML19220C948 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 05/14/1979 |
| From: | Mattson R Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7905160091 | |
| Download: ML19220C948 (2) | |
Text
'
t M kt t-$ c M l
j ' l' OUTLINE y-et Sgg 50-526 I.
Introduction II. ' Core Description (description of core)
ITI.
Core Flow Resistance a.
TC metnod Venturi b.
c.
What B&W Says d.
What other say e.
What we think IV.
Natural Convection a.
SG solid NRC conclusion
(
c.
SG Steaming INEL d.
SGs steaming V.
Core Coclability with Natural Convection VI.
Bubble Effect on Core Cocling and Natural Convection VII. Will a Bubble Grow & What Will it Louk Like - H2 & 02 in Solution and Radiolysis - short & long tern VIII.
Sequence of Events of Obtaining Nat. Circ.
a.
Base plan review of B&W proposal conclusion on its acceptability, issues needing resolution b.
Contingencies
- i. A SG steaming 0
primary at 230 F bubble in pressurizer 7 90516009l118 203
2-ii. BSG solli ASG isolited primary cecreasing from 230 bubble in pressurizer c.
Contingercies with no pressucizer level d.
Switchover from short tern A & B secondary cooling to long term A & B secondary cooling IX.
Indicators of Natural Convection Achievement X.
Control of Primary Level, Pressure, and Chemistry in Long Tern Natural Circulation a.
Risk of vessel overpressure XI.
Contingency for Loss of Natural Convection XII.
Baron Diluticn and Criticality XIII.
Degradation to Core Melt O
O