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Working Party on International Nuclear Data Evaluation Co-operation (WPEC) Subgroup 25

Validation of Fission Product Decay Data for Decay Heat Calculations

This working party was established to promote the exchange of information on nuclear data evaluations, measurements, nuclear model calculations, validation and related topics and to provide a framework for co-operative activities between the participating projects.

For information about the work of this subgroup, consult the WPEC Subgroup 25 Proposal by T. Yoshida from the 2005 WPEC meeting in Antwerp 2005.

The proposal suggested the following steps in improving decay data for better decay heat calculations:

  1. Identify the nuclides which contribute largely to the FP decay heat in the cooling time range from 10 to 5000s from summation calculation.
  2. Find out the nuclides whose decay data are crucially suffering from the pandemonium problem among the nuclides identified in the first step.
  3. Validate the necessity of further β-feeding measurement including the TAGS for the nuclides found out in the second step.
In doing this work the working party makes full use of the information from the theoretical calculation of the β-feeding.

 

Meetings

For more information, consult the NEA meetings and conferences web page.

Previous meetings

Orsay, France, 17 July 2006

A meeting was held at IPN Orsay, France, on 17 July 2006. This meeting focussed on the need for new measurements, possibly at the ALTO facility in Orsay. A brief summary record of the meeting is available, as are the presentations given during the meeting:

  1. Decay Heat After One Fission Pulse, M. Kellett
  2. Decay heat calculations, an industrial perspective. Total, β and γ-ray with JEFF-3.1, R. Mills
  3. What TAGS can offer, M. Kellett
  4. β-Decay Total Absorption Spectroscopy: A Tool for Applied and Fundamental Research, J. Tain
  5. Measurements for Reactor Decay Heat, A. Algora
  6. Precision spectroscopy with reactor antineutrinos, M. Fallot (not present) and D. Lhuillier
  7. The ALTO project at IPN Orsay, F. Ibrahim
Issy-les-Moulineaux, France, 3 May 2006

A meeting was held on 3 May 2006 in conjunction with the general WPEC meeting, at the NEA offices in Issy-les-Moulineaux, France. The meeting was held in collaboration with the IAEA as a Consultants Meeting (CM) on beta-decay and decay heat. The summary record of the meeting is available, as are some of the presentations given during the meeting:

Vienna, Austria, 12-14 December 2005

The IAEA organised a Consultants' Meeting on Beta-decay and decay heat held in collaboration with the WPEC Subgroup 25, which was held in December 2005 at the IAEA. More information on that meeting can be found below:

Publications and documents

A collection of publications of interest for improving decay data in the evaluated data libraries (e.g. JEFF-3.1/RDD and JENDL-FPDD 2000) is available below. Access to these documents are only available for the members of the WPEC subgroup. Please request (if needed) a new password at the NEA registration page.

Related links

E-mail, phone and fax contact details for the NEA Data Bank.

Last updated on 18 September 2007