Seismic (SSE) evaluation for the 291Z stack at the Hanford Site -- Addition of environmental monitoring penetrations
The purpose of this 291Z stack analysis is to determine the structural effects of chipping additional holes into the stacks concrete walls. The proposed holes are for new environmental monitoring sample probes to be installed at three different elevations. The approximate elevations proposed at this time are 50 ft, 135 ft and 175 ft. There will be four holes required at each of the elevations to support two sample probes extending across the diameter of the stack. A structural sensitivity study has been completed to assess the effect of the proposed holes on the baseline seismic qualification of the stack completed by URS/John A. Blume & Associates, Engineers, San Francisco, California (URS/Blume) in August, 1988. Results of the sensitivity study indicate that the stack would still have adequate structural moment capacity if the new holes were drilled cutting the vertical strength reinforcing steel, or if existing penetrations added since original construction have inadvertently cut vertical rebars. For current and future modifications, no vertical rebar should be cut. A limited number of horizontal rebar, no more than 2, may be cut at the new hole locations without significantly influencing the stack structural shear capacity. New penetrations in the 291Z stack should not be located below elevation 47 ft., 4 in. due to rebar layout and the fact that maximum seismic structural loads occur below this elevation. No vertical rebar should be cut when chipping the new penetrations in the stack concrete wall for the environmental monitoring equipment. Wind load qualification was reviewed. Seismic loads govern over wind loads for all structural load cases; therefore no additional wind analyses are required.
- Research Organization:
- Westinghouse Hanford Co., Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-87RL10930
- OSTI ID:
- 10182987
- Report Number(s):
- WHC-SD-CP-ES-160; ON: DE94019011; BR: 35AF11201/35AF11202; TRN: 94:019016
- Resource Relation:
- Other Information: PBD: 31 Aug 1994
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cost-Benefit Analysis of High-Strength Materials for Safety-Related Nuclear Reinforced Concrete Shear Walls
EFFECT ON 105KW NORTH WALL DUE TO ADDITION OF FILTRATION SYSTEM
Related Subjects
HANFORD RESERVATION
FUEL REPROCESSING PLANTS
STACKS
SEISMIC EFFECTS
WIND LOADS
AIR POLLUTION MONITORS
INSTALLATION
RADIATION MONITORS
MODIFICATIONS
PLUTONIUM OXIDES
REPROCESSING
DYNAMIC LOADS
REINFORCED CONCRETE
054000
050800
HEALTH AND SAFETY
SPENT FUELS REPROCESSING