ANALYSIS OF DYNAMIC CHARACTERISTICS OF BRITISH TYPE GAS COOLED REACTORS
Technical Report
·
OSTI ID:4191822
The positive temperature coefficient of reactivity which a British type reactor obtains over a certain irradiation level of its natural uranium fuel, has presented a new problem to the inherent safety of this type of reactors. An analysis is described of the dynamic characteristics of three British type reactors with positive temperature coefficient of reactivity, using an analog computer. The three reactors considered are Calder Hall Reactor, the power reactor proposed to the Japan Atomic Power Company by G.E.C. of Britain, and Hunterstone Power Reactor. Here, they are referred to as R-I, R-II, and R-III, respectively. Setting up a rather simplified model, transient characteristics of R-I were studied at first, applying several disturbances to the reactor such as change in reactivity, coolant inlet temperature, and coolant flow. Secondly, composing more complex equations of a thermal system on R-II, the same study was made. In this case the effect of the sleeve and radiative heat transfers between the clad and sleeve, and the sleeve and moderator were taken into consideration. Thirdly, more detailed and comprehensive study was pursued on R-III, although the same equations as those of R-II were applied to the thermal system of this reactor. Results obtained on R-I, R-II, and R-III were compared and analyzed. Virtual time constant of the thermal system and critical value of the positive temperature coefficient of moderators for these reactors were investigated. (auth)
- Research Organization:
- Japan. Atomic Energy Research Inst., Tokyo
- NSA Number:
- NSA-14-004945
- OSTI ID:
- 4191822
- Report Number(s):
- JAERI-1006-B
- Country of Publication:
- Japan
- Language:
- English
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