Activation of water in the cooling system at the pulsed spallation neutron source, KENS

✍ Scribed by S Itoh; T Miura; M Furusaka; S Yasui; Y Ogawa; Y Kiyanagi; S Sasaki; K Iijima

• Book ID: 104152092
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 75 KB
• Volume: 60
• Category: Article
• ISSN: 0022-3697
• DOI: 10.1016/s0022-3697(99)00172-9

✦ Synopsis

We measured the radioactivity of 7 Be and 3 H in the ambient-temperature water moderator cooling system at the pulsed spallation neutron source, KENS. The detected activity of 3 H in cooling water was in agreement with the production estimated from the neutron flux obtained from a neutronic calculation, however, the results of 7 Be was only about 0.1% of the estimation. We tried to investigate the distribution of 7 Be trapped in the cooling system. We also measured the time constants of the trapping process, and the result suggests that a large amount of the produced 7 Be is trapped in parts of the cooling system with a very short time constant.