CUED Publications database

First core design for the I<sup>2</sup>S-LWR 18-month cycle

Li, S and Kotlyar, D and Parks, GT and Salazar, DA and Franceschini, F and Petrovic, B (2016) First core design for the I<sup>2</sup>S-LWR 18-month cycle. In: UNSPECIFIED pp. 807-814..

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Abstract

This paper presents first cycle fuel management options developed for the Integral Inherently Safe Light Water Reactor (I 2 S-LWR). The I 2 S-LWR is an advanced 2850 MWt integral pressurized water reactor with enhanced safety beyond that of Gen-III+ reactors. Its baseline fuel and cladding materials are U 3 Si 2 and advanced FeCrAl steel, respectively. An equilibrium cycle with an 18-month cycle length was developed for the I 2 S-LWR design. This paper focuses on designing the first cycle for the I 2 S-LWR with the same reloading strategy implemented for the equilibrium cycle. In order to obtain similar to equilibrium performance (e.g. power peaking factors), the applied methodology relied on adjusting the local enrichments. However, the number of local enrichments was found to be prohibitively large, which may be impractical for real designs. Hence, the final objective was to reduce the number of utilized enrichments considerably without introducing additional burnable poisons. The latter was achieved by spatial condensation, where multiple regions with various enrichments were replaced each with a single averaged enrichment zone. The results confirm that a practical number of enrichments can be achieved, which contributes to good fuel cycle economics.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:39
Last Modified: 03 Aug 2017 03:03
DOI: