Method for the Calculation of DPA in the Reactor Pressure Vessel of Atucha II
Creators
- 1. Gerencia de Licenciamiento y Control de Reactores Nucleares, Autoridad Regulatoria Nuclear, Avenida Del Libertador 8250, Ciudad Autonoma de Buenos Aires 1429 (Argentina)
Description
One of the limiting factors of the life of a nuclear power plant (NPP) is the state of the reactor pressure vessel (RPV). Embrittlement is the most important effect affecting RPV aging. The irradiation with neutrons, especially fast neutrons, is the primary cause of this embrittlement. NPP safe operation requires to ensure RPV integrity over its lifetime, threatened by the neutron radiation-induced embrittlement. In this paper, we identify the areas where the RPV neutron radiation is maximum and perform calculations of the displacement-per-atom (DPA) rate in those areas using the MCNP5 code. It was determined that the maximum DPA rate in the RPV wall with fresh fuel element (FE) is 3.76(3) x 10-12 s-1, it takes place in front of FEs BA42 and BL43, and it is symmetrical about the central channel, LG04, and LH03.
Additional details
Publishing Information
- Journal Title
- Science and Technology of Nuclear Installations (Online)
- Journal Volume
- 2011
- Journal Issue
- 2011
- Journal Page Range
- p. 6
- ISSN
- 1687-6083
INIS
- Country of Publication
- Egypt
- Country of Input or Organization
- Egypt
- INIS RN
- 42050621
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- ATOMIC DISPLACEMENTS; ATUCHA-2 REACTOR; CROSS SECTIONS; EMBRITTLEMENT; FUEL ELEMENTS; NEUTRON FLUX; NUCLEAR POWER PLANTS; PRESSURE VESSELS; RADIATIONS; THREE-DIMENSIONAL CALCULATIONS
- Descriptors DEC
- CONTAINERS; HEAVY WATER COOLED REACTORS; HEAVY WATER MODERATED REACTORS; NATURAL URANIUM REACTORS; NUCLEAR FACILITIES; PHWR TYPE REACTORS; PHYSICAL RADIATION EFFECTS; POWER PLANTS; POWER REACTORS; PRESSURE TUBE REACTORS; RADIATION EFFECTS; RADIATION FLUX; REACTOR COMPONENTS; REACTORS; THERMAL POWER PLANTS; THERMAL REACTORS