Document: NUREG-0800
Document ID: 0f097ac2-b7b1-437d-a055-1546a9094ef6
Document Type: srp
Title: CONCRETE CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1006/ML100620888.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.1
CFR Part: 
CFR Title: 

Content:
11 Revision 3 - May 2010 for the plant, this load combination may be eliminated provided the load combination is shown to be less severe than one of the other load combinations. E. For those plants to which 10 CFR 50.34(f)(3)(v) applies, the requirements regarding loads and loading combinations include the following: Containment integrity should be maintained by meeting the requirements of Subarticle CC-3720 of the ASME Code (considering pressure and dead load alone) during an accident that releases hydrogen generated from 100-percent metal-water reaction of the fuel cladding and accompanied by either hydrogen burning or added pressure from postaccident inerting (assuming carbon dioxide is the inerting agent). At a minimum, the ASME Code requirements will be met for a combination of dead load and an internal pressure of 310 Kilo Pascals (KPa) or 45 pounds per square in gauge (psig) The containment structure should be designed against the loadings produced by the inadvertent full actuation of a postaccident inerting hydrogen control system (assuming carbon dioxide), excluding seismic or design-basis accident loadings. Under these conditions, the loadings should not produce strains in the containment liner in excess of the limits established in Subarticle CC-3720 of the ASME Code. The requirements of Subarticle CC-3720 of the ASME Code should be met when the containment structure is exposed to the following loading conditions: i. For the factored load category: D + Pg1 + [Pg2 or Pg3 ] ii. For the service load category, the strains in the containment liner should not exceed the limits set forth in Subarticle CC-3720 when exposed to pressure Pg3. iii. As a minimum design condition for either condition i or ii above, the following load combination must be satisfied: D + 310 kPa (45 psig) where D = Dead load Pg1 = Pressure resulting from an accident that releases hydrogen generated from 100-percent metal-water reaction of the fuel cladding Pg2 = Pressure resulting from