Evaluation of N fuels boiling subchannel flow and DNB behavior
Description
An updated evaluation of the boiling and burnout performance of the N Reactor fuels is presented. Several new procedures and improvements for fuel analyses are described. These include the following items incorporated into the BOTHER computer program: subroutine FLOBAL which balances the flows among the boiling and nonboiling channels to equilibrate pressure drop; a new enthalpy imbalance factor for the MKIV fuel of 19.4% (95/95 basis); an updated method for calculating the two-phase pressure drop multiplier for each channel type, which includes both momentum and friction terms; and changes in the BOTHER code. The net effect of these changes is to predict DNBR limits before connecter boiling and at slightly higher flows and lower tube powers than predicted previously
Availability note (English)
MF available from INIS under the Report Number; Available from NTIS., PC A02/MF A01.Additional details
Publishing Information
- Imprint Pagination
- 13 p.
- Report number
- UNI--661
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 10438109
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- BURNOUT; COMPUTER CODES; DEPARTURE NUCLEATE BOILING; FUEL ELEMENTS; HEAT TRANSFER; MATHEMATICAL MODELS; N-REACTOR; PERFORMANCE; PRESSURE DROP
- Descriptors DEC
- BOILING; ENERGY TRANSFER; ENRICHED URANIUM REACTORS; GRAPHITE MODERATED REACTORS; LWGR TYPE REACTORS; NUCLEATE BOILING; PHASE TRANSFORMATIONS; PLUTONIUM PRODUCTION REACTORS; POWER REACTORS; PRODUCTION REACTORS; REACTOR COMPONENTS; REACTORS; WATER COOLED REACTORS