ML19344A333
| ML19344A333 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 12/01/1978 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| References | |
| NUDOCS 8008130549 | |
| Download: ML19344A333 (1) | |
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-SUPPLEMENTARY SECOND ROUND QUESTION FROM REACTOR PHYSICS SECTION - MIDLAND
- 232.5-The information presented in Revision-14'to the FSAR is
' insufficient to pennit a review of the criticality of the proposed high density fuel storage system. The following information will be required in order to complete the review:
l.
A description of the racks including, in particular, those features affecting their reactivity.
2.
A description of..the assumptions made in the analysis, including those regarding the reactivity of the fuel-to be stored, credit taken for absorbers in the fuel and racks, temperature of water in the pool, and f
placement of assemblies in racks.
3:
A description of'the analytical models used, including the results of code verifications and calcula',ional 4
l biases and uncertainties.
4.
A discussion of the effect on the reactivity of uncertain-ties in material properties and geometry of the racks and. fuel placement in the racks.
- 5.
A discussion of the effect of abnormal fuel distributions on the reactivity of the racks - for example a dropped assembly lying across the racks, an assembly lowered into a -non-designed location (if-possible), and other abnonnal configurations.
- 6. 1The results of the criticality analysis should be pre-sented for the nominal rack design and fuel placement, the various calculational and mechanical uncertainties should be given along with the total-uncertainty.
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