ML18360A465
| ML18360A465 | |
| Person / Time | |
|---|---|
| Issue date: | 12/20/2018 |
| From: | James Drake NRC/NRR/DLP/PLPB |
| To: | |
| Drake J, NRR/DLP, 415-8378 | |
| Shared Package | |
| ML18360A449 -Pkg. | List: |
| References | |
| Download: ML18360A465 (4) | |
Text
Proposed Options for Closure of EPRI Depletion Code Validation Approach Review U.S. Nuclear Regulatory Commission December 20, 2018
Meeting Objectives
- 10 CFR 50.68 requirements
- Potential resolution paths 2
10 CFR 50.68 Requirements 10 CFR 50.68(b)(4) excerpt:
If credit is taken for soluble boron, the k-effective [(kL)] of the spent fuel storage racks loaded with fuel of the maximum fuel assembly reactivity must not exceed 0.95, at a 95 percent probability, 95 percent confidence level, if flooded with borated water...
95/95 implies that uncertainty and bias need to be explicitly addressed Translated to SFP criticality analysis as: kL kC + unc. + bias 3
Potential Resolution Paths to Address Bias and Uncertainty (Not Exhaustive)
Reconcile the data set with the hypotheses supporting the quadratic fit Use the linear regression analysis in Rev. 1 of the topical report Impose a limitation and condition at high burnup values Other 4