# Sensitivity of posterior parameter correlations and response parameter correlations to prior response uncertainty

## Abstract

The two parameters one response model of the generalized linear least squares parameter adjustment methodology was used in order to analyze the procedure of improving cross sections agreement with integral experimental results. Two extreme adjustment cases were considered. One case is using extremely accurate measured integral responses, such as k{sub eff} of Godiva or Jezebel for instance. The other one is modifying only one parameter, for instance the modification of {nu}-bar in ENDF/B-VII, in order to improve agreement of calculated responses with corresponding integral measurements results. In both cases new posterior parameters correlations are generated. The conclusion is that it is not advised to use integral measurements information in the evaluation process of a general purpose nuclear data file. (authors)

- Authors:

- Racah Inst. of Physics, Hebrew Univ. of Jerusalem, Edmond J. Safra Campus, Jerusalem, 91904 (Israel)

- Publication Date:

- Research Org.:
- American Nuclear Society, Inc., 555 N. Kensington Avenue, La Grange Park, Illinois 60526 (United States)

- OSTI Identifier:
- 22105880

- Resource Type:
- Conference

- Resource Relation:
- Conference: PHYSOR 2012: Conference on Advances in Reactor Physics - Linking Research, Industry, and Education, Knoxville, TN (United States), 15-20 Apr 2012; Other Information: Country of input: France; 8 refs.

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 22 GENERAL STUDIES OF NUCLEAR REACTORS; CORRELATIONS; CROSS SECTIONS; DATA COVARIANCES; EVALUATION; LEAST SQUARE FIT; NUCLEAR DATA COLLECTIONS; SENSITIVITY

### Citation Formats

```
Wagschal, J. J.
```*Sensitivity of posterior parameter correlations and response parameter correlations to prior response uncertainty*. United States: N. p., 2012.
Web.

```
Wagschal, J. J.
```*Sensitivity of posterior parameter correlations and response parameter correlations to prior response uncertainty*. United States.

```
Wagschal, J. J. Sun .
"Sensitivity of posterior parameter correlations and response parameter correlations to prior response uncertainty". United States.
```

```
@article{osti_22105880,
```

title = {Sensitivity of posterior parameter correlations and response parameter correlations to prior response uncertainty},

author = {Wagschal, J. J.},

abstractNote = {The two parameters one response model of the generalized linear least squares parameter adjustment methodology was used in order to analyze the procedure of improving cross sections agreement with integral experimental results. Two extreme adjustment cases were considered. One case is using extremely accurate measured integral responses, such as k{sub eff} of Godiva or Jezebel for instance. The other one is modifying only one parameter, for instance the modification of {nu}-bar in ENDF/B-VII, in order to improve agreement of calculated responses with corresponding integral measurements results. In both cases new posterior parameters correlations are generated. The conclusion is that it is not advised to use integral measurements information in the evaluation process of a general purpose nuclear data file. (authors)},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {2012},

month = {7}

}