ML18033B367
| ML18033B367 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 06/08/1990 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML18033B366 | List: |
| References | |
| NUDOCS 9006150140 | |
| Download: ML18033B367 (3) | |
Text
UNIT 2 EFFECTIVE PAGE LIST REMOVE 3.2/4.2-12 3.2/4.2-13 INSERT 3.2/4.2-12*
3.2/4.2-13
- Denotes overleaf or spillover page.
9006150l40 900608 PDR ADOCK 05000260 P
NOTES FOR TABLE 2 A 1.
Whenever the respective functions are required to be OPERABLE there shall be two OPERABLE or tripped trip systems for each function. If the first column cannot be met for one of the trip systems, that trip system or logic for that function shall be tripped (or the appropriate action listed below shall be taken). If the column cannot be met for all trip
- systems, the appropriate action listed below shall be taken.
A.
Initiate an orderly shutdown and have the reactor in Cold Shutdown in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
B.
Initiate an orderly load reduction and have Main Steam Lines isolated within eight hours.
C.
Isolate Reactor Water Cleanup System.
D.
Isolate Shutdown Cooling.
E.
Initiate primary containment isolation within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
F.
The handling of spent fuel will be prohibited and all operations over spent fuels and open reactor wells shall be prohibited.
G.
Isolate the reactor building and start the standby gas treatment system.
H.
Immediately perform a logic system functional test on the logic in the other trip systems and daily thereafter not to exceed 7 days.
I.
Deleted J.
Withdraw TIP.
K.
Manually isolate the affected lines.
Refer to Section 4.2.E for the requirements of an inoperable system.
L. If one SGTS train is inoperable take actions H or A and F. If two SGTS.trains are inoperable take actions A and F.
2.
When it is determined that a channel is failed in the unsafe condition, the other channels that monitor the same variable shall be functionally tested immediately before the trip system or logic for that function is tripped.
The trip system or the logic for that function may remain untripped for short periods of time to allow functional testing of the other trip system or logic'or that function.
3.
There are four sensors per steam line of which at least one sensor per'rip system must be OPERABLE.
BFN Unit 2 3.2/4.2-12
~
)
~
NOTES FOR TABLE 2 A ont'd) 4.
Only required in RUN Mode (interlocked with Mode Switch).
5.
Not required in RUN Mode (bypassed by Mode Switch).
6.
Channel shared by RPS and Primary Containment S Reactor Vessel Isolation Control System.
A channel failure may be a channel failure in each system.
7.
A train is considered a trip system.
8.
Two out of three SGTS trains required.
A failure of more than one will require actions A and F.
9.
Deleted 10.
Refer to Table 3.7.A and its notes for a listing of Isolation Valve Groups and their initiating signals.
11.
A channel may be placed in an inoperable status for up to four hours for required surveillance without placing the trip system in the tripped condition provided at least one OPERABLE channel in the same trip system is monitoring that parameter.
12.
A channel contains four sensors, all of which must be OPERABLE for the channel to be OPERABLE.
Power operations permitted for up to 30 days with 15 of the 16 temperature switches OPERABLE.
In the event that normal ventilation is unavailable in the main steam line tunnel, the high temperature channels may be bypassed for a period of not to exceed four hours.
During periods when normal ventilation is not available, such as during the performance of secondary containment leak rate tests, the control room indicators of the affected space temperatures shall be monitored for indications of small steam leaks.
In the event of rapid increases in temperature (indicative of steam line break),
the operator shall promptly close the main steam line isolation valves.
13.
The nominal setpoints for alarm and reactor trip (1.5 and 3.0 times background, respectively) are established based on the normal background at full power.
The allowable setpoints for alarm and reactor trip are 1.2-1.8 and 2.4-3.6 times background, respectively.
BFN Unit 2 3.2/4.2-13