Author: Widorski, M.
Paper Title Page
TUPAB316 New Operational Quantities for Radiation Protection by ICRU and ICRP: Impact on Workplaces at Accelerators 2231
 
  • Th. Otto, M. Widorski
    CERN, Meyrin, Switzerland
  
  In ra­di­a­tion pro­tec­tion, Ef­fec­tive Dose E quan­ti­fies sto­chas­tic ra­di­a­tion detri­ment. E is de­fined as a weighted sum of ab­sorbed dose to or­gans and tis­sues and can­not be mea­sured di­rectly. ICRU has de­fined op­er­a­tional quan­ti­ties to mea­sure ef­fec­tive dose ap­prox­i­mately, such as Am­bi­ent dose equiv­a­lent H*(10). At high en­er­gies, the es­ti­mates pro­vided by H*(10) de­vi­ate strongly from ef­fec­tive dose. In 2020, ICRU and ICRP have rec­om­mended new op­er­a­tional quan­ti­ties for ex­ter­nal ra­di­a­tion with a de­f­i­n­i­tion close to the one of ef­fec­tive dose, and pub­lished an ex­ten­sive col­lec­tion of con­ver­sion co­ef­fi­cients from par­ti­cle flu­ence to the new quan­ti­ties (1). Am­bi­ent dose H* serves for op­er­a­tional mon­i­tor­ing pur­poses. The new de­f­i­n­i­tion al­le­vi­ates the ob­served dis­crep­an­cies of H*(10) with ef­fec­tive dose. In this paper, we pre­sent a nu­mer­i­cal study of ef­fec­tive dose E, am­bi­ent dose equiv­a­lent H*(10) and am­bi­ent dose H* in ra­di­a­tion fields at work­places at pro­ton- and elec­tron ac­cel­er­a­tors. These places in­clude lo­ca­tions be­hind pri­mary shield­ing, in ac­cess mazes and in the vicin­ity of ac­ti­vated ac­cel­er­a­tor com­po­nents.
(1) ICRU Report 95, Operational quantities for external radiation 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB316  
About • paper received ※ 11 May 2021       paper accepted ※ 02 July 2021       issue date ※ 23 August 2021  
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