tailieunhanh - RADIATION PROTECTION MANUAL Episode 5

Tham khảo tài liệu 'radiation protection manual episode 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | EM 385-1-80 30 May 97 STATE OFFICE PHONE NO. 24-HOUR PHONE NO. Ohio 614-644-2727 614-644-1909 Oklahoma 405-271-7484 800-522-0206 Oregon 503-731-4014 503-731-4014 Pennsylvania 717-787-2480 717-783-8150 Rhode Island 401-227-2438 401-621-1600 South Carolina 803-737-7400 803-253-6488 South Dakota 605-773-3364 605-224-7888 Tennessee 615-532-0360 615-741-0001 Texas 512-834-6688 512-458-7460 Utah 801-536-4250 801-533-4097 Vermont 802-865-7730 802-244-8727 Virginia 804-786-5932 804-674-2400 Washington 360-586-8949 360-786-8001 West Virginia 304-588-3526 304-558-5380 Wisconsin 608-267-4782 800-943-0003 Wyoming 307-777-7574 Not available 4-14 Chapter 5. Dose Limits and ALARA. 5-1. Occupational Dose Limit structure. As described in Chapter 4 doses to Authorized Users Assistants are regulated by the NRC or Agreement State OSHA and DA and USACE regulations. To ensure compliance with all regulatory agencies USACE has established a three tiered approach to worker dose limits. Tier 1 is the NRC regulatory dose limits which are never to be exceeded. Tier 2 is the USACE dose limits which are effectively 10 of the NRC limits. The USACE limits will ensure that USACE workers will be in compliance with OSHA regulations and Agreement State regulations. Tier 3 is project specific dose goals which will be set below the USACE dose limits. Project specific dose goals are used to promote the concept of ALARA keeping the dose as low as is reasonably achievable taking social technical and financial considerations into account. Army and NRC regulations require a radiation protection program that promotes ALARA. Descriptions and examples of the technical definitions of the various dose items are explained in paragraph 3-5 of this manual. Table 5-1 highlights the dose limits put forth in the three-tiered approach. EM 385-1-80 30 May 97 5-2. USACE Dose Limits. a. Tier 1 NRC dose limits. Each user of radioactive material or radiation generating devices shall limit occupational doses to individuals .