ML20028F089
| ML20028F089 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/25/1983 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML20028F085 | List: |
| References | |
| NUDOCS 8301310136 | |
| Download: ML20028F089 (3) | |
Text
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s ENCLOSURE PROPOSED TEMPORARY TECHNICAL SPECIFICATIONS AND JUSTIFICATION FOR SINGLE LOOP OPERATION 0301310136 830125 PDR ADOCK 05000259 PDR i
P
SURVEILTANCE REOUIRDtE*tTS LIMITING CONDITIONS FOR OPERATIOM s
4.6.E Jet Pumos 3.6.F Recirculation Punn Operation b.'The indicated value of core flow rate varies ra the vslue derived
- 1. The reactor shall not be
~
from loop flow ope ra ted with one sensurements by more recirculation l'o'o p o u t of than 10%.
service after midnight (CST)
- c. The diffuser to lower 1/31/83. W i th the reactor operating, if one Plenum differential recirculation loop is out Pressure reading on an of service, the plant shall individual jet pump be placed in a hot shutdown con-yaries from the mean of dition by midnight (CST) 1/31/83, all je t pump unless the loop is sooner returned differential pressures to service. This change is not by nsre than 10%.
valid after 1/31/83.
2.
Following one pump
- 2. Whene,ver there is e
operation, the discharge recirculation flow with the valve of the low speed pum'p reactor in the Startup or may not be opened unicss Run Mode and one the speed of the faster recirculation pump is pump is less than 50% of operating with the its rated speed.
equalizer valve closed, the diffuser to lower plenum
- 3. Steady state operation with differential pressure shall both recirculation pumps be checked daily and the out of s e rv i c e for up to 12 i
differential pressure of an hours is permitted.
During i s
individual jet pump in a such interval restart of loop shall not vary from the mean of all jet pump the recirculation pumps is permitted, provided the differential pressures in loop discharge temperature that loop by more than is within 75'F of the 10%.
of saturation temperature tha reactor vessel water 4.6.F Recirculation Pump Operation as determined by d ors e The total 1.
Recirculation pump speeds shall be pressure.
e1apsod time in natuea1
, checked and logged at least once circulation and one pump per day, operation must
- 2. No additional nurveillance l
bc no I
greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
required.
i
- 4. With one recirculation loop out g
of service, the reactor shall recirculation pump during Y
not be operated alfove 50%
steady state operation. check and log the loop discharr,e power level.
temperature and dome saturation temperature..
G.
Strneturat Intecrity G.
Structur.at T rtt e n r i t Y 1.
The structural integrity of
- 1. Table 4.6.A together with f"
- notes, the primary system shall be supplementary L
specifics the 182 I
5.
g -
By letters dated March 4, 1982, September 3, 1982, and January 6, 1983 from L. M. Mills to H. R. Denton we have submitted proposed technical specifications and justification to operate in single recirculation pump mode for extended periods of time. At present, however, Browns Ferry unit 1 is limited to hot standby due to 6 problem with one of recirculation motor generator sets. We are actively working on the problem and are optimistic that the system may be repaired in the next few days. In the interim, we are requesting a temporary relaxation of the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> restriction on single loop operation as specified in 3.6.F.1.
The need to operate Browns Ferry unit 1 is especially critical because Browns Ferry unit 2 and 3 are shutdown for a refueling outage and an unscheduled maintenance outage respectively. In the meanwhile, we expect that either the motor generator will be repaired or permanent technical specifications can be approved. Justification is provided by the fact that we have previously operated in this mode for an extended period of time in a very satisfactory manner. Our experience has shown that this mode, particularly at 50 percent power, is very reliable and closely resembles normal operation.