ML21286A222

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Amendment 29 to Updated Final Safety Analysis Report, Appendix G - BWR Operating States
ML21286A222
Person / Time
Site: Browns Ferry  Tennessee Valley Authority icon.png
Issue date: 10/04/2021
From:
Tennessee Valley Authority
To:
Office of Nuclear Reactor Regulation
Shared Package
ML21286A574 List: ... further results
References
Download: ML21286A222 (3)
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Text

MA T R I X 1

BW R OPERATING STATES

STATES C O N D IT IO N S A B C D E F

R eac tor ves s el head off X X

R eac tor ves s el head on X X X X

Shutdow n X X X

Not s hutdow n X X X

Pres s ure < 825 ps ig(2) X(1) X(1) XX

Pres s ure > 825 ps ig XX

D efinition

Shutdow n: keff s uffic iently les s than 1.0 that the full w ithdraw al of any one c ontrol rod c ould not produc e c ritic ality under the m os t res tric tive potential c onditions of tem perature, pres s ure, c ore age, and fis s ion produc t c onc entrations.

NOTES:

(1) Bec aus e the reac tor ves s el head is off in States A and B, pres sure is atm os pheric pres s ure.

(2) At les s than 825 ps ig, the m ain s team line is olation valves are interloc ked c los ed w hen the m ode s w itc h is in R UN.

MA TRIX 2 S heet 1 TYPES OF OPERATIONS AND EVENTS APPLICABLE IN EACH BWR OPERATING STATE

TYPES OF OPERATION BWR OPERATING STATE AND EVENTS A B C D E F

PLANNED OPERATION

1. Refueling Out age X X
2. Achieving Criticality X X X X X X
3. Heat up XX
4. P ower Operat ion X
5. A c hieving S hut down X X X
6. Cooldown X X X
7. (Open)
8. (Open)
9. (Open)
10. (Open)
11. (Open)

ABNORMAL OPERATIONAL TRANSIENTS

Nuc lear S y s t em P res s ure Inc reas e

12. Generat or t rip XX
13. Turbine t rip (wit h by pas s ) X X
14. Is olat ion of all main s t eam lines X X X X
15. Is olat ion of one main s t eam line X X X X 16 Los s of vac uum (t urbine t rip wit hout by pas s ) X X X X

Moderat or Temperat ure Dec reas e

17. (Open)
18. Los s of feedwat er heat ing X
19. S hut down c ooling (RHRS ) malfunc t ion (t emperat ure dec reas e) X X X X
20. Inadvert ent P ump S t art (t emperat ure dec reas e) X X X X X X

Reac t ivit y Ins ert ion

21. Cont rol rod wit hdrawal error X X X X X X
22. Fuel as s embly ins ert ion X
23. Cont rol rod removal X
24. (Open)

Los s of Coolant Invent ory

25. P res s ure regulat or failure X X X X
26. Inadvert ent opening of a relief or safetyvalve XXXXXX MA TRIX 2 (Cont inued) S heet 2

TYPES OF OPERATION BWR OPERATING STATE AND EVENTS A B C D E F

27. Los s of feedwat er flow X X X X
28. Tot al los s of off-s it e power X X X X X X

Core Coolant Flow Dec reas e

29. Rec irc ulat ion flow c ont rol failure dec reas ing flow X X X X
30. Trip of one rec irc ulat ion pump X X X X
31. Trip of t wo rec irc ulat ion pumps X X X X
32. Rec irc ulat ion pump s eiz ure X X X X

Core Coolant Flow Inc reas e

33. Rec irc ulat ion flow c ont rol failure inc reas ing flow X X X X
34. S t art up of idle rec irc ulat ion pump X X X X X X

Core Coolant Temperat ure Inc reas e

35. Los s of s hut down c ooling X X X X

E x c es s of Coolant Invent ory

36. Feedwat er Cont roller failure-max imum demand X X X X

A CCIDE NTS

37. (Open)
38. Cont rol rod drop ac c ident X X X X
39. P ipe break s ins ide primary c ont ainment X X X X
40. Fuel-handling ac c ident X X X X X X
41. P ipe break s out s ide primary c ont ainment X X X X
42. (Open)
43. (Open)

SPECIAL EVENT

44. Los s of habit abilit y of t he c ont rol room X X X X X X

SPECIAL EVENT

45. A bilit y t o s hut down reac t or wit hout c ont rol rods X X X
46. (Open)
47. (Open)
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