Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (6): 60006-060006.doi: 10.11889/j.0253-3219.2020.hjs.43.060006

• SPECIAL SECTION ON THE 11TH NATIONAL CONFERENCE ON NEW AND RESEARCH REACTORS (PART II) • Previous Articles     Next Articles

Calculation of DPA in the main components of a LBE-cooled fast reactor (BLESS-D)

Eing Yee YEOH,Linsen LI(),Xiaosong CHEN Yaodong CHEN   

  1. State Power Investment Corporation Research Institute, Beijing 102209, China
  • Received:2020-02-20 Revised:2020-04-23 Online:2020-06-15 Published:2020-06-12
  • Contact: Linsen LI E-mail:lilinsen@spic.com.cn
  • About author:YEOH Eing Yee, female, born in 1983, graduated from Tsinghua University with a doctoral degree in 2012, focusing on reactor physics research and shielding calculations

Abstract: Background

A lead-bismuth eutectic cooled fast reactor called breeding lead-based economical safe system – demonstration (BLESS-D) is proposed to meet the public demands of a safer, more economical and more environmental-friendly nuclear system. BLESS-D is a pool-type reactor with 300 MW thermal power. The materials undergo changes of their mechanical and physical properties under neutron irradiation. Some of the internal components in BLESS-D are not replaceable during the reactor life, which results in radiation damage to the material that affects the reactor life.

Purpose

This study aims to evaluate the radiation damage of the structural materials through the computation of displacement-per-atom (DPA) for the main components of BLESS-D reactor.

Methods

The DPA calculation was implemented by using the SPECTER and MCNP computer code. DPAs of materials for fuel cladding, inner vessel, main pump casing, steam generator casing and reactor vessel were obtained and compared with the DPA limits of irradiation effect of these materials.

Results

The maximum DPA of the fuel cladding, inner vessel, pump, #1 steam generator, #2 steam generator and reactor tank are 5.35 dpa·a-1, 2.38×10-1 dpa·a-1, 8.48×10-3 dpa·a-1, 7.25×10-2 dpa·a-1, 7.50×10-2 dpa·a-1 and 1.94×10-5 dpa·a-1, respectively. The accumulated DPA value is analyzed and compared to the imposed limit.

Conclusions

Considering that the reactor life of BLESS-D is 20 years, the maximum accumulated DPA value in the inner vessel segment is higher than the imposed limits, it is necessary to conduct detailed analysis and design optimizations to reduce the accumulated DPA.

Key words: Lead-cooled fast Reactor, Radiation damage, DPA, MCNP, SPECTER

CLC Number: 

  • TL328