ML21286A395

Amendment 29 to Updated Final Safety Analysis Report, Chapter 7, Table 7.6, Refueling Interlocks Effectiveness

ML21286A395
Person / Time
Site:	Browns Ferry
Issue date:	10/04/2021
From:	Tennessee Valley Authority
To:	Office of Nuclear Reactor Regulation
Shared Package
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References
Download: ML21286A395 (2)

Text

BFN-16 TABLE 7.6-1 (Sheet 1)

REFUELING INTERLOCK EFFECTIVENESS Refueling Refueling Platform Service Platform Hoists Platform Mode Situation Position MMH* FMH* FG Hoist Control Rods Switch Attempt Result

1. Not near core UL* UL* UL* UL* All rods Refuel Move refueling No restrictions fully inserted platform over core

2. Not near core UL UL UL UL All rods Refuel Withdraw rods Cannot withdraw fully inserted more than one rod

3. Not near core UL UL UL UL One rod Refuel Move refueling No restrictions withdrawn platform over core

4. Not near core Any hoist loaded UL One rod Refuel Move refueling Platform stopped or FG not fully up withdrawn platform over core before over core

5. Not near core UL UL UL UL More than Refuel Move refueling Platform stopped one rod platform over core before over core withdrawn

6. Over core UL UL UL UL All rods Refuel Withdraw rods Cannot withdraw fully inserted more than one rod

7. Over core Any hoist loaded UL All rods Refuel Withdraw rods Rod block or FG not fully up fully inserted

8. Not near core UL UL UL L* All rods Refuel Withdraw rods Rod block fully inserted

9. Not near core UL UL UL L All rods Refuel Operate service No restrictions fully inserted platform hoist

10. Not near core UL UL UL L One rod Refuel Operate service Hoist operation withdrawn platform hoist prevented

BFN-16 TABLE 7.6-1 (Sheet 2)

REFUELING INTERLOCK EFFECTIVENESS Refueling Refueling Platform Service Platform Hoists Platform Mode Situation Position MMH* FMH* FG Hoist Control Rods Switch Attempt Result

11. Not near core UL UL UL UL All rods Startup Move refueling Platform stopped fully inserted platform over core

12. Not near core UL UL UL L All rods Startup Operate service No restrictions fully inserted platform hoist

13. Not near core UL UL UL L One rod Startup Operate service Hoist operations withdrawn platform hoist prevented

14. Not near core UL UL UL L All rods Startup Withdraw rods Rod block fully inserted

15. Not near core UL UL UL UL All rods not Startup Withdraw rods No restrictions fully inserted

16. Over core UL UL UL UL All rods Startup Withdraw rods Rod block fully inserted

17. Any Any condition Any condition Any condition, Startup Turn mode switch Scram reactor not at to run power

• LEGEND: MMH - Monorail Mounted Hoist FMH - Frame Mounted Hoist FG - Fuel Grapple UL - Unloaded L - Fuel-loaded