By D A Conley; Jerald L Edson; C F Fineman; Idaho National Engineering Laboratory.; U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Engineering
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Extra info for Aging study of boiling water reactor high pressure injection systems
Steam will continue to be generated after shutdown by residual stored heat and fission product decay heat. Figure 5 shows a typical HPCI system including a steamdriven turbine driving a booster pump, a reduction gear, a main pump (sometimes considered a pump assembly), many valves, high pressure piping, two injection water sources, and the associated instrumentation. All of the HPCI components, except the inboard isolation valve, are located outside primary containment but inside the reactor building.
Pumps are the next most-failed HPCS component, which places them higher on the list than in the HPCI system. 3). While the LER database utilizes 68 cause codes and 30 cause/effect codes, the prominent causes for HPCI and HPCS failures from LER data are listed in Table 16. Resultant component faults and unknown faults are listed more than 80% of the time as the failure cause in the LER database. They describe a component failure that is the result of another failure or that describe an unknown cause, respectively.
The auxiliary oil pump may also be manually started. Both pumps draw from the same reservoir that is an integral part of the turbine baseplate. This reservoir typically has a capacity of approximately 590 L (155 gal). 7 MPa (100 psi) to the turbine stop valve, the control valve operators, and the turbine governor. 26-MPa (38-psi) oil. All oil except that going to the turbine control valve and the turbine stop valve passes through a filter. In addition to the filters, the oil going to the turbine bearings and the main pump passes through the lube oil cooler mounted on the turbine base.
Aging study of boiling water reactor high pressure injection systems by D A Conley; Jerald L Edson; C F Fineman; Idaho National Engineering Laboratory.; U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Engineering