Document: NUREG-0800
Document ID: 04c894f5-e3ab-479e-8bca-0722777c79a7
Document Type: srp
Title: Revision 4 – January 2016
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1502/ML15027A401.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11
CFR Part: 
CFR Title: 

Content:
ing. By excluding dissolved and entrained noble gases from surveillance requirements, Standard Technical Specification 3.11.1.4 should apply to the lowest radioactive inventory of activation and mixed fission products determined for any tank and component listed in Standard Technical BTP 11-6-24 Revision 4 – January 2016 Specification 3.11.1.4 as the radioactivity inventory limit for all tanks and components identified in that specification. Dissolved and entrained noble gases are not included since they do not remain in solution and are rapidly aerated out of the liquid phase during processing and spillage, should it occur. Since all process and storage tanks are vented, dissolved and entrained noble gases emanating from process fluids, and rooms where this equipment is located, are collected, monitored, and exhausted via the gaseous waste management system. Tritium is included because it is an environmentally mobile radionuclide and recent operating experience has shown that it is present in most incidents involving spills and leaks, as noted in the NRC’s lessons learned task force report on liquid radioactive release. Operational experience has shown that some operating reactors have used temporary process and storage tanks during maintenance and service periods, or when temporary solidification equipment is used at the plant, and, consequently, Standard Technical Specification 3.11.1.4 should indicate such tanks as being temporary. The limit for the total inventory of radioactive materials in temporary tanks should be < 10 curies (0.37 TBq), excluding dissolved and entrained noble gases. If the temporary tank is mobile and not used (i.e., empty of liquid) for more than a calendar quarter, the tank need not be included in Tables 3.3-11 and 4.3-11 of the Standard Technical Specifications. Regardless of the defined maximum inventory of radioactive materials for such tanks or components, these specifications do not relieve the licensee from regulatory