Skip to main content

Alert

Due to a lapse in appropriations, the NRC has ceased normal operations. However, excepted and exempted activities necessary to maintain critical health and safety functions—as well as essential progress on designated critical activities, including those specified in Executive Order 14300—will continue, consistent with the OMB-Approved NRC Lapse Plan.

Application of RELAP5/MOD3.1 Code to the LOFT Test L3-6 (NUREG/IA-0024)

On this page:

Download complete document

Publication Information

Date Published: February 1998

Prepared by:
S.S. Pylev and V.L. Roginskaja

Nuclear Safety Institute
Russian Research Centre
"Kurchatov Institute"
Kurchatov Square, 1
123182, Moscow
Russia

Prepared as part of:
The Agreement on Research Participation and Technical Exchange
under the Code Assessment and Maintenance Program

Published by:
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555

Availability Notice

Abstract

A calculation of LOFT Experiment L3-6, a small break equivalent to a 4-in. diameter rupture in the cold leg of a four-loop commercial pressurized water reactor, has been performed to help validate RELAP5/MOD3.1 for this application.

The version of the code to be used is SCDAP/RELAP5/MOD3.1.8d0.

Three calculations were carried out in order to study the sensitivity to change break nozzle superheated discharge coefficient.

Conducted comparative analysis of the LOFT L3-6 experiment shows on the whole a reasonable agreement between calculated and measured data. Some discrepancies in the system pressure do not distort a picture of the transient.

Page Last Reviewed/Updated Tuesday, March 09, 2021

Page Last Reviewed/Updated Tuesday, March 09, 2021