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Abstract

A theoretical study has been made of the events following a hypothetical criticality accident to a particular simplified notional design of transport flask. Possible causes for the accident are sabotage, quality assurance failure or accidental very severe impact causing rearrangement of flask components. The accident arises, it is assumed, during the refilling of the flask with water, bringing the system to delayed critical. As the water level continues to rise, reactivity is added causing the power to rise, and thus temperatures in the fuel, cladding and water to increase. Firstly, various neutronics parameters of the system were calculated. Secondly, a computer program, which simulates the physical conditions in the flask, has been developed. Results from this computer program have been obtained and are presented up to the point at which boiling first takes place. The direction in which further development is required is discussed also.

Additional information

Authors: BROWN M L, UKAEA SAFETY AND RELIABILITY DIRECTORATE, LONDON (UK);HAGUE P, UKAEA SAFETY AND RELIABILITY DIRECTORATE, LONDON (UK);MATHER D J UKAEA SAFETY AND RELIABILITY DIRECTORATE, LONDON (UK), UKAEA SAFETY AND RELIABILITY DIRECTORATE, LONDON (UK)
Bibliographic Reference: EUROPEAN APPLIED RESEARCH REPORTS + NUCLEAR SCIENCE AND TECHNOLOGY SECTION, VOL. 6 (1985), NO. 3, PP 455-532, (EUR 9212 EN).
Availability: Can be ordered online
Record Number: 1989123093900 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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