Masters Theses

Abstract

"The purpose of this project is to predict the natural circulation start-up test for the Standardized Nuclear Unit Power Plant System (SNUPPS). In order to make this prediction, a best-estimate, thermal-hydraulic computer code called RETRAN-01 is used.

The start-up test procedures require the simultaneous tripping of all four reactor coolant pumps (RCPs). Natural circulation is confirmed when the three test acceptance criteria have been met. Since this transient is symmetrical, a one-loop approximation of the Nuclear Steam Supply System (NSSS) is normally considered adequate in the nuclear industry. However, there is a concern over how to model the four actual pumps as one. This concern represents the second part of this project. Therefore, two models are developed, one representing all four RCPs individually (UE-4) and the other representing them as one (UE-lA).

Both models displayed SNUPPS's ability to achieve natural circulation after about 1400 seconds and resulted in steady-state values of 313.2° C (595.8° F) for the core exit temperature, 23 °C (42° F) for the core temperature rise, and 826 kg/s (1821 lb. /s) for the core mass m flowrate. In conclusion, this project represents the first step toward predicting the start-up test results and verifies that a one loop approximation is adequate. Model improvements are provided as recommendations for future work toward best-estimate results"--Abstract, p. ii

Advisor(s)

Mueller, Gary Edward, 1954-

Committee Member(s)

Edwards, D. R.
Culp, Archie W., Jr.

Department(s)

Nuclear Engineering and Radiation Science

Degree Name

M.S. in Nuclear Engineering

Publisher

University of Missouri--Rolla

Publication Date

Fall 1983

Pagination

vii, 143 pages

Note about bibliography

Includes bibliographical references (pages 80-84)

Rights

© 1983 Roger Lee Boyer, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 4990

Print OCLC #

10424277

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