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Following the completion of all required testing; the test valves were disassembled and visually inspected for evidence of degradation resulting from exposure to the environments of this program.
5. SUMMARY OF PROGRAM RESULTS AND CONCLUSIONS
Table 5.1 summarizes the major test parameters and the simulated test levels.
TABLE 5.1 SUMMARY OF MAJOR TEST PARAMETERS & QUALIFICATION LEVELS
TEST PHASE Thermal Aging Simulation
TEST PARAMETERS 2A & 2C - 140°C for 2.4 days
LEVEL SIMULATED* 2A, 11A, 2C & 11C - 10 years while
(REF: Section 4.1)
Wear Aging Simulation (REF: Section 4.1.2) Pressurization Aging Simulation (REF: Section 4.1.3) Radiation Aging Simulation (REF: Section 4.1.4)
Vibration Aging Simulation (REF: Section 4.1.6)
2B - 140°C for 4.8 days 11A & 11C - 140°C for 11.9 days 11B - 140°C for 23.8 days while energized 40,000 cycles
Fifteen ambient excursions to 80 psig
A & C Series - 20 x 106 rads; B- Series - 40 x 106 rads of gamma radiation. Rate not to exceed 1.0 x 106 rad/hour. 5 to 100 to 5 Hz continuous inusoidal sweeps, 0.75 g’s, sweep ate of 2 octaves/min., total duration
minutes in each (3) axis.
energized in a 45°C (113°F) ambient temperature. 2B & 11B - 20 years while energized in a 45°C (113°F) ambient temperature. 40,000 de-energize to energize to de- energize cycles Fifteen containment pressurization cycles from atmospheric pressure to 80 psig 2A, 11A, 2C & 11C – at least 21 x 106 rads 2B & 11B - at least 41 x 106 rads
Normal plant induced vibration that
could reasonably be expected to occur during the life of the valve.
Seismic Aging (OBE) Simulation (REF: Section 4.1.7) Seismic DBE (SSE) Simulation (REF: Section 4.2.1)
Two sweeps from 2 to 35 to 2 Hz at a rate of 1 octave/min.
Single frequency, single axis continuous sinusoidal dwell tests at 1/3 octave intervals from 1 to 100 Hertz and any resonant frequencies not encompassed by the 1/3 octave intervals up to 15 g’s.
Five typical operating basis earthquakes with up to 3 g peak acceleration. Fragility levels are indicated in qualification test report Appendix H.
Radiation DBE Simulation (REF: Section 4.2.2)
1.8 x radiation
rads of gamma
1.8 x 108
dose of 108 rads
Environmental DBE Simulation (REF: Section 4.2.3)
30 day LOCA/HELB simulation. Peak ambient temperature of 492°F and peak ambient pressure of 113 psig.
with 10% margin Temperature/Pressure
shown in figure 4.2.1 and 4.2.2