ML19319D075
| ML19319D075 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 03/17/1978 |
| From: | FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML19319D073 | List: |
| References | |
| NUDOCS 8003050853 | |
| Download: ML19319D075 (2) | |
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Technical Specification Change Request No. 22 (Appendix A)
Replace page 3/4 4-16 with the attached revised page 3/4 4-16.
Proposed Change Revise Specification 4.4.6.2.c by deleting the words "with the modulating valve fully open."
Reason for Proposed Change In some power reactors, a constant pressure is maintained on the reactor coolant pump seals by way of a modulating valve in the seal return line to the makeup and purification system.
Seal degradation in this design may be determined by a decrease in seal return flow, i.e., more leakage goes through the seals and the modulating valve must close to maintain its given seal pressure.
For this type of system, maximum CONTROLLED LEAKAGE is observed when the modulating valve is fully open.
At Crystal River - Unit 3, it is the inlet seal flow which is controlled by a pre-set (not modulating) inlet valve (FSAR Figure 9-2; far left, center).
All seal water flow from the seals is counted as CONTROLLED LEAKAGE and any seal degradation is detected by an increase in this flow.
Therefore, the Specification with the above-referenced words deleted is correct for Crystal River - Unit 3.
Safety Analysis Justifying Proposed Change This proposed change does not involve the changing of any safety analyses performed for Crystal River - Unit 3.
It does change the Specification to reflect the actual equipment at the plant and the way that the CONTROLLED LEAKAGE has always been determined.
8003050 E3
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r REACTOR COOLANT SYSTEM SURVEILLANCE REQUIREMENTS (Continued) c.
Measurement of the CONTROLLED LEAKAGE from the reactor coolant pump seals when the Reactor Coolant System pressure is 2150 + 20 psig at least once per 31 days.
d.
Performance of a Reactor Coolant System water inventory balance at least once per 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> during steady state operation.
O CRYSTAL RIVER - UNIT 3 3/4 4-16
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