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While performing an engineering review of … While performing an engineering review of instrumentation setpoints associated with the Overpressure Protection System (OPS) T (EIIS:JC), T it was determined that there were past occasions during which Indian Point Unit 2 may have operated in a condition prohibited by the plant's Technical Specifications. T At the time, plant personnel were unaware of these non-compliant conditions because it was believed that the OPS requirements were being met. T The OPS is designed to relieve the Reactor Coolant System (RCS) T (EIIS:AB) pressure for certain overpressure transients when RCS temperature is less than or equal to 305F to prevent these incidents from causing the peak RCS pressure to exceed 10 CFR 50, Appendix G limits. T Indian Point Unit 2 Technical Specification 3.1.A.4 specifies the requirements for the OPS. T Furthermore Technical Specification Figures 3.1.A-2 and 3.1.A-3 define operational restrictions (pressurizer pressure, pressurizer level, and RCS temperature), which must be met if OPS is unavailable. T Engineering review has concluded that on past occasions, OPS operational restrictions may not have been satisfied if instrument errors are conservatively assumed. T The cause for this condition is attributed to procedural deficiencies. T Procedural changes were implemented to account for the appropriate OPS instrument uncertainties.</br></br>RC RM 366 (6-1998strument uncertainties.
RC RM 366 (6-1998 +
While performing an engineering review of … While performing an engineering review of instrumentation setpoints associated with the Overpressure Protection System (OPS) T (EIIS:JC), T it was determined that there were past occasions during which Indian Point Unit 2 may have operated in a condition prohibited by the plant's Technical Specifications. T At the time, plant personnel were unaware of these non-compliant conditions because it was believed that the OPS requirements were being met. T The OPS is designed to relieve the Reactor Coolant System (RCS) T (EIIS:AB) pressure for certain overpressure transients when RCS temperature is less than or equal to 305F to prevent these incidents from causing the peak RCS pressure to exceed 10 CFR 50, Appendix G limits. T Indian Point Unit 2 Technical Specification 3.1.A.4 specifies the requirements for the OPS. T Furthermore Technical Specification Figures 3.1.A-2 and 3.1.A-3 define operational restrictions (pressurizer pressure, pressurizer level, and RCS temperature), which must be met if OPS is unavailable. T Engineering review has concluded that on past occasions, OPS operational restrictions may not have been satisfied if instrument errors are conservatively assumed. T The cause for this condition is attributed to procedural deficiencies. T Procedural changes were implemented to account for the appropriate OPS instrument uncertainties.</br></br>RC RM 366 (6-1998strument uncertainties.
RC RM 366 (6-1998 +
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