Conceptual Design for the Development of Unified Spent fuel Attribute Tester by MCNP Analysis

Year
2012
Author(s)
Ki-Hyun Kim - Korea Institute of Nuclear Nonproliferation And Control
Jae-Bum Park - Korea Institute of Nuclear Nonproliferation And Control
Byung-Marn Koh - Korea Institute of Nuclear Nonproliferation And Control
Abstract
The Unified Spent fuel Attribute Tester (USAT) is a verification device for the spent fuel assemblies and non fuel items in the spent fuel pond. USAT started from the concept of combinations of two devices. One is the Spent Fuel Attribute Tester (SFAT) for spent fuel assembly verification. The other is the IR radiated fuel Attribute Tester (IRAT) for non fuel item verification. Both of them have the same theoretical concept in respect of using a gamma spectroscopy, which can analyze the specific spectrum of the gamma ray from the target. On the other hand, there are many differences between SFAT and IRAT in terms of the geometry, shielding method and material. In this study, the modeling and measurement simulation of the SFAT and IRAT had been conducted by using the Monte Carlo computer code (MCNP) to find the main design parameters of the USAT. We tried to find the type of the detector and shielding method to maintain the performance of the SFAT and IRAT, and modified some parts to enhance mobility and integrity.