AP0 Target Vault Shielding Study
Efforts are currently underway to redesign the neutron covers to meet radiation-safety guidelines, with the goal of reducing the radiation level over the vault by at least a factor of 100. This note describes the results of measurements of radiation attenuation by sample shields. The purpose of the shielding study is to provide data for the redesign of the neutron covers. The radiation escaping from the neutron covers appears to be predominantly gammas. In addition, there is a small, more penetrating component, which may consist of energetic (>200 MeV) neutrons leaking past the neutron covers. Reduction of the measured radiation by more than an order of magnitude is easily achieved by placing a 6-inch steel plate over the existing neutron covers. However, the desired reduction by two orders of magnitude requires further attenuation of the more penetrating component. The conclusion of the study is that 48 inches of concrete should adequately attenuate the radiation.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 983973
- Report Number(s):
- FERMILAB-PBAR-NOTE-509; oai:inspirehep.net:862450; TRN: US201015%%1035
- Country of Publication:
- United States
- Language:
- English
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