ML18047A662
| ML18047A662 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 11/01/1982 |
| From: | Toner K CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| TASK-09-05, TASK-9-5, TASK-RR NUDOCS 8211160369 | |
| Download: ML18047A662 (20) | |
Text
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consumers Power company General Offices: 1945 West Parnall Road, Jackson, Ml 49201 * (517) 788-0550 November 1, 1982 Dennis M Crutchfield, Chief Operating Reactors Branch No 5 Nuclear Reactor Regulation US Nuclear Regulatory Commission Washington, DC 20555 DOCKET 50-255 - LICENSE DPR
- PALISADES PLANT - HEATING, VENTILATING AND AIR CONDITIONING -
SEP TOPIC IX-5, VENTILATION SYSTEMS - SUBMITTAL OF SWITCHGEAR ROOM, CABI.E SPREADING ROOM AND AUXILIARY FEEDWATER PUMP ROOM TEST RESULTS As documented in the Consumers Power Company submittal of March 31, 1982, Consumers Power Company formulated plans to verify by test or analysis that the cable spreading and switchgear rooms, as well as the auxiliary feedwater pump room, would not heat up excessively due to a loss of off-site power to the ventilation fans.
The Consumers Power Company submittal of August 17, 1982 indicated that such testing would be completed by October 29, 1982.
The aforementioned tests have since been completed and this submittal provides the results.
Attachment A of this submittal provides a detailed account of the switchgear room and cable spreading room testing.
Attachment B provides a similar account for the auxiliary feedwater pump room testing.
The following paragraphs of this cover letter provide a brief summary of the results.
As described in detail in Attachment A, ventilation tests show that certain equipment in the cable spreading room cannot withstand a loss of normal ventilation for an indefinite period of time.
Upon loss of normal ventilation, the operator has sufficient time, however (up to six hours),
to take preventive action to ensure that the room's design temperature of l04°F is not exceeded.
Such preventive action consists of starting ventilation fan V-47 from the control room.
It should be noted that initiation of such action would be the result of a control room annunication which occurs whenever the cable spreading room temperature reaches l04°F. It should also be noted that V-47 is capable of being powered from an Emergency Diesel Generator.
8211160369 821108 PDR ADOCK 05000255 P
DMCrutchfield, Chief Palisades Plant SEP TOPIC IX-5 November 1, 1982 The lC and lD switchgear rooms are not affected by a loss of ventilation since no appreciable heat sources are contained in these rooms.
The battery rooms, which are contained within the larger cable spreading room, were not tested since the battery room fans are powered from a safety-related source and, therefore, would not be vulnerable to a loss of off-site power.
During the conduct of the cable spreading room tests, it was observed that the inverter cabinets, the charger cabinets and auxiliary feedwater junction boxes J-569 and J-570 require f9rced-air cooling.
Therefore, fans will be added to these cabinets and boxes as appropriate to ensure adequate ventilation during periods when normal ventilation is in service and during periods when normal ventilation is out of service due to loss of power.
The fans will be powered by an uninterruptible source and will be installed during the next refueling outage.
As described in detail in Attachment B, the temperature rise in the auxiliary feedwater pump room resulted in peak room temperatures considerably below the room's procedural upper temperature limit during testing with the room's normal ventilation turned off.
The above conclusion is valid regardless if the motor driven auxiliary feedpump or the steam driven auxiliary feedpump is operating.
The auxiliary feedwater pump room tests verified that the room can safely withstand a loss of power to the ventilation units for a long period of time; at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
Also, the simple measure of opening a door provides adequate ventilation for an indefinite per~od.
Kerry A Toner Senior Licensing Engineer CC Administrator, Region III, USNRC NRC Resident Inspector - Palisades ATTACHMENTS 2
_j
Summary of Events CONSUMERS POWER COMPANY Palisades Plant ATTACHMENT A CABLE SPREADING ROOM HEATING, VENTILATING & AIR CONDITIONING TEST REPORT The purpose of this test was to initiate a loss of normal ventilation to the cable spreading room and the lC and lD switchgear rooms to verify whether the resulting temperature rise is acceptable.
These rooms are normally ventilated with non-class lE fans V-33 and V-43.
Fan V-47, which is normally off, is started when high temp-erature is annunciated in the control room.
The following is a sequence of events performed as part of this test.
7/14/82 - Recorders were installed at suspected hot spots (inside cabinets and at upper elevations in the room) to monitor a total of thirteen points inside the cable spreading room and the lC and lD switchgear rooms.
A second recorder was installed to monitor the outdoor temperatures located behind the Training Building.
Phase I*
of the testing commenced when the recorders were turned on to monitor normal oper-ating temperatures with fans V-33 and V-43 on and fan V-47.off.
7/16/82 - Phase I testing (which consisted of all normal fans V-33 and V-43 running) was completed by obtaining the chart paper from the recorders for the 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> between 1900 on 7/14/82 and 1900 on 7/15/82.
The recorders were left operating until 7/19/82 but the unattended equipment provided readings that were very difficult to correlate and summarize.
Attachment Al provides a tabulated summary of Phase I test temperatures.
7/19/82 - The test procedure was reviewed and appro~ed by the Plant Review Committee.
7/20/82 - The test procedure was reviewed* and signed by the Technical Superintendent and the Plant Manager.
The procedure was then approved by the Shift Supervisor for ~mplementation.
During the normal temperature measurements it was noted that several of the cabinets were near or over th~ temperature limits imposed by the procedure.
Therefore, the doors on these cabinets were opened and additional normal temperatures were taken.
The inverters, chargers and auxiliary feedwater junction boxes still exceeded the procedural limits with the doors open.
Two floor fans were obtained and it was demonstrated that the cabinets could be force cooled with floor fans to a temperature below the "procedural 11 limits.
7/21/82 - Additional floor fans were purchased and each cabinet was force cooled for the duration of Phase II testing.
Phase II was started as designated by the pro-cedure with the exception of the cabinet doors being open (which was allowed in the contingency portion of the procedure).
- Note, Phase I and II testing pertains to the cable spreading and lC and lD switchgear rooms.
Phase III and IV testing pertains to the auxiliary feedwater pump room.
CONSUMERS POWER COMPANY Palisades Plant Attachment A 7/22/82 - Phase II testing proceeded without event until 0537 when temperatures in the room reached the procedural limit and the V-47 exhaust fan was started to cool down the rooms.
Starting the exhaust fan was also a designated contingency step in the procedure.
The exhaust fan was operated for approximately eight hours and then was shut off allowing the rooms to reheat for approximately two hours.
The next contingency step was executed by opening the double doors to the turbine building.
The new double doors leading to the outside were also opened.
These doors remained open for the remainder of the test.
After approximately six hours, the exhaust fan was restarted with the doors open.
This was a combination contingency step designated by the test engineer.
Phase II testing was completed at 2400 on 7/22/82.
Attachment A2 is a tabulated summary of Phase II test temperatures.
7/23/82 - The test e~uipment was disassembled and all of the recorder charts were turned over to the test engineer.
7/28/83 - The Plant completed preliminary ventilation status checks and found that all of the exhaust dampers associated with fans V-33 and V-43 were closed.
This caused V-33 and V-43 to merely recirculate air rather than exchange air
-with the outside.
The Phase I test ter.lperatures were thus decla.recl non-re:presentativc of nornal conditions.
7/30/82 8/5/82 8/6/82
- After the ventilation dampers had been restored to their normal status, additional measurements were taken to determine the differential between inside and outside temperatures.
An additional measuring point was incorporated into the Phase I re-run.
This point was immediately outside of the turbine buildi~g. Attachment Al also provides a tabulated summary of Phase I test temperatures obtained after the V-33 and V-43 exhaust dampers were opened.
Summary of Test Results Phase I Attachment Al is a summary of the recorded temperatures for the outside and for three locations inside the rooms.
The first set of recorded temperatures 2
was obtained prior to the opening of the ventilation exhaust dampers of the ventilation system.
The final set of temperatures was obtained after the ventilation system was corrected.
Point 1 was the temperature in the lD switchgear room.
Points 2 and 7 were temperatures at opposite ends of the cable spreading room.
Point 2 was near the Bus 11-12 load center.
Point 7 was near the DC motor control center.
Point 17 was outside the double doors in the turbine building wall at elevation 607.5 feet.
This point was representative of ambient air temperatures outside of the plant near turbine building since the turbine building doors leading to the outside were opened.
CONSUMERS POWER COMPANY Palisades Plant Attachment A Phase II Attachment A2 shows a summary of the for five locations inside the rooms.
as described above.
Point 3 was the the temperature in junction box J570 Test Conclusions Phase I recorded temperatures for the outside and Points 1, 2 and 7 were the same locations temperature in inverter Y40.
Point 12 was behind the Bll transformer.
As shown in Attachment Al, the normally operating ventilation system (ie, V-33 and V-43 on) is not capable of reducing the inside temperature to match that of 3
the outside.
Utilizing the temperature obtained on 8/5/82, after the ventilation fans' exhGuEt dampers were opened, it can be seen that the largest difference in temperature (AT~ from the0inside to the outsid~ (ie, comparing point 2 to point 17) ranged from 1. 0 F to 15. 0 F.
Attachment A3 tabulates the~ T from point 2 to the outside (turbine building, point 17).
Attachment A4 plots this.0.T as a function of outside air temperature monitored at the turbine building (point 17).
Attachments A3 and A4 provide an indication of the switchgear room temperature response to typical variations in 011tside ambient air temperature over a 24-hour period at the plant site.
As suggested iTI the attachments, the room temperature will remain essentially constant and will not significantly exceed the peak out-side ambient air temperation variation.
r::'herefore, it is the opinion of Consumers Power Company that the switchgear room temperature would approximate the outside ambient air temperature during the hottest portion of the day and then would begin to decrease thereafter as the outside ambient decreased.
Attachment A5 tabulates the recorded outside ambient air temperature at the Plant over the last seven years.
Attachment A5 data was obtained from daily operator's logs where the outside ambient air temperature is recorded once per shift.
As shown in the Attachment, the peak recorded outside ambeint air temperature for the months of April through September was 95°F on 6/5/76.
Although the data sample was contructed from temperature recordings performed only once per shift, and not from a continuous recording device which would "catch" the actual peak reading during the. day, it is reasonable to expect that sampled data does generally reflect ambient conditions during the warmest months.
Based on the data of Attach-ments A3 & A4 and on the outside air recordings, it is the opinion of Consumers Power Company that, for the most part, the cable spreading room temperature is maintained well below the room's design temperature of l04°F during normal operation even in the warmest months.
In fact, it is reasonable to expect that the cable spreading room temperature would normally be 95°F or less for most of the warmest months of the year.
Another significant conclusion which results from Phase I testing is that the inverter cabinets, the charger cabinets and auxiliary feedwater junction boxes J-569 and J-570 are often operating at or near temperatures which approximate the manufacturer's recommended normal operating temperatures.
Phase II CONSUMERS POWER COMPANY Palisades Plant Attachment A As shown in the Phase II test data (see Attachment A2) the cable spreading room temperature increased 7°F in the six hours immediately following the loss of room ventilation (ie, V-33 and V-43 turned off).
Since the cable spreading room air temperature is expected to approximate the outside ambient temperature during the warmest months, Consumers Power Company expects that the operator would have at least six hours to respond to a loss of cable spreading room ventilation and take action to limit the room temperature to l04°F or less.
If the operator were to take action immediately after the six hours had elapsed, 4
it is of the opinion of Consumers Power Company that the room temperature would be limited at approximately 102°F ( 95°F + 7°F); given heat-up rates-.
consistent with those observed during the Phase II testing, It should be noted that should heat-up rates greater than those expected be encountered, a control room annunciation will occur at a room temperature of l04°F.
The operator will respond per procedure by starting V-47.
As shown in Attachment A2, starting fan V-47 resulted in a prompt temperature drop in the cable spreading room of approximately 6°F in the first hour of V-47 operation.
Therefore, starting V-47 at either an elapsed time of six hours after the loss of ventilation or before the six-hour period has elapsed results in a high probability that the operator will limit the room temperature below l04°F. ttt should be noted that V-47 is started from the control room.) The Attachment A2 data table shows that other attempts to reduce the room temperature such as opening the door between the lD switchgear room and th~ cable spreading room or opening the doors between the cable spreading room and the turbine building had little or no effect.
As shown in Attachment A2, the lD switchgear room temperatures cycle with the outdoor temperature while the ventilation is turned off.
Opening the door between the lD switchgear room and the cable spreading room had no detectable effect in the temperatures.
There are no major heat sources in the room and the heat sinks are capable of controlling the. ambient room temgerature.
The temperature in this room is not expected to exceed the 104 F limit should a loss of ventilation occur.
Two contingency steps were not performed.
These were the opening of the battery room doors and the doors to the lC switchgear room.
The battery room doors were not opened because it was discovered that the battery room exhaust fans were recently connected to a safety related MCC and therefore the fans would be operational on loss of offsite power.
Therefore, the ;fans were left on during Phase II.
The doors to the lC switchgear room were not opened because the Phase I and early Phase II test data showed that there was no temperature change in that room with or without the fans running.
Phase II (Continued)
CONSUMERS POWER COMPANY Palisades Plant Attachment A In conclusion, the cable spreading room can not withstand a loss of ventilation for an indefinite period of time, although a considerable amount of time (as much as six hours) is available for operator action* to limit the room's temperature to a value below t!le room's upper design limit of l04°F.
The lC switchgear room was not affected by the loss of ventilation.
The two switchgear rooms lC and lD, can ~ithstand a loss of ventilation for very long periods of time since there are no appreciable heat sources located withiri these rooms.
It should also be restated that the inverter cabinets, charger cabinets and auxiliary fe~dwater junction boxes J-569 and J-570 require forced-air cooling during periods of normal ventilation as well as during periods when ventilation is not available.
Consumers Power Company Palisades Plant ATTACHMENT Al Summary of Phase I Temperatures (°F)
With V-33 and V-43 On and V-47 Off The following readings were taken prior to opening the exhaust dampers on the ventilation system.
Location Outside Date Time G)
CD Outside Training Bldg)
(Turb Bldg) 7/14/82 1900 84 93 89 77 II 2100 84 92 87 76 2300 81 89 85 72 7/15/82 0100 81 88 84 72 0300 80 86 83 70 II 0500 79 87 83 70 II 0700 81 89 84 70 0900 81 90 85 77 1100 81 91
- 86.
83 1300 83 93 88 82 II 1500 83 93 88 84 1700 82 91 86 82 The following readings were taken after the exhaust dampers were opened, 8/5/82 1430 82 88 87.5 80 81 1630 82 89.5 87.5 80 83 II 1830 82 89.5 87.5 79 81 II 2030
- 81. 5 89 87 76.5 80 II 2230 81 89 86 75 76 8/6/82 0030 81 88.5 86 73.5 75 0230 80.5 88 85 71 73 II 0430 80 86 84 71 71 0630 79.5 86 83.5 70 72 II 0830 79.5 86 83 70 72 1030 80.5 86.5 84.5 75.5 79 1230
- 81. 5 87.5 86.5 79 84 1430 83 89 88 82 88
Consumes Power Company Palisades Plant ATTACHMENT A2 Summary of Phase II Temperatures (OF}
Date Time 1
2 3
7 12 Outside Operating Conditions 7/21/82 0810 82 86 123 83 100 64 Norm operating temp. readings 0910 82 87 124 83 101 72 0957 84 88 100 86 102 78 Open cabinet doors 1042 85 90 113 87 97 84 Start floor fans 1134 85 90 100 89 91 83 Turn of£ V-33 & V-43 1225 84 92 98 89 93 83 1400 85 94 98 91 95 84 1530
. 85 95 98 92 95 84 1700 86 96 99 92 96 85 1810 86 97 99 92 97 89 1907 87 97 100 93 97 87 I930 87 97 IOO 93 97 85 2130 87 97 IOO 94 97 78 2330 86 97 100 94 97 78 7/22/82 0135 85 97 100 94 97 78 0300 84 96 100 94 97 76 0430 84 97 100 94 97 72 0537 83 97 100 94 98 72 Start V-47 0630 83 9I 94 87 9I 72 0735 83 89 92 85 94 72 Closed door between ID & cable sprdg.
10I7 83 89 9I 85 89 72 II25 83 89 9I 85 89 73 I255 83 88 9I 85 89 75 I420 85 89 92 85 89 75 Stop V-47 I455 85 92 gt.
88 93 76 I555 85 93 96 89 94 76 Open door between ID & cable sprdg.
I600 85 94 95 90 94 76 Open one door to turbine bldg.
I626 86 94 95 90 94 76 Open both doors to turbine bldg.
I647 86 94 94 90 94 76 I738 87 95 95 9I 94 74 I823 86 95 94 9I 94 74 2045 85 95 93 9I 94 72 22I7 84 94 93 9I 94 71 Start V-47 2335 81 87 89 84 84 7I Told SS to return to normal 2345 84 89 91 87 88 71 Stop V-47 Start V-33 & V-43 nuI082-0067aI42
Consumers Power Company Palisades Plant ATTACHMENT A3 Temperature Difference (.t.T) Between Inside the Switchgear Room and Outside the Turbine Building Point 2*
Outside (TRB
.t.T Date Time Temp (°F)
BLDG) Temp ( °F)
-QJ 8/5/82 1430 88 81 7
1630 89.5 83 6.5 1830 89.5 81 8.5 2030 89 80 9
2230 89 76 13 8/6/82 0030 88.5 75 13.5 0230 88 73 15 0430 86 71 15 B630 86 72 14 0830 86 72 14 1030 86.5 79 7.5 1230 87.5 84 3.5 1430 89 88 1
- Refer to Attachment Al
18-
/bl
- 14 I I
12+
AT (op) j r I 10+.
l gj_
I I
~+
I I 47 I * ' !
2 l. I I
I I
72 Consumers Power Company Palisades Plant Attachment A4 Plot of AT (Inside Cable Spreading Room To Outside Turbine Building) Vs. Outside Turbine Building Temperature*
I I
I I
I I
I 74 7~
7S 8o
'0"2.
84 8G:.
Outside Turbine Building Temperature (oF)
I 89
- Temperature Data Obtained During Normal Conditions (ie, V-33 and V-43 on And V-47 Off)
I 90
Consumers Power Company Palisades Plant ATTACHMENT A5 0
Peak Outside Ambient Air Temperature ( F)
As Recorded in Operator's Logs Month 1976 1977 1978 1979 1980 April 76(16) 70(21) 66(10) 66(25) 70(21)
May 74(25) 82(15) 84(29) 85 ( 8) 78(25)
June 95 ( 5) 87(27) 83(26) 84(16) 83(27)
July 87(14) 94(14) 84(19) 81(27) 91( 7)
August 90(27) 83(27) 85(15) 8.3 ( 9) 83( 6)
September 76( 7) 80( 1) 86( 5) 75( 2) 84( 4)
- Each table entry consists of the Peak Recorded Temperature followed by the day of the month.in parentheses.
1981 1982 69( 4) 68(24) 71( 3) 87(14) 90(14) 79( I) 89( 7) 89(16) 84(26) 89( 3) 74( 1) 86(10)
\\
CONSUMERS POWER CO.MPANY PALISADES PLANT ATTACHMENT B AUXILIARY FEEDWATER PUMP ROOM HEATING, VENTILATING & AIR CONDITIONING TEST REPORT Summary of Events As noted in the test procedure, the purpose of this test was to simulate the loss of ventilation to the auxiliary feedwater (AFW) pump room.
These rooms are ventilated with non-Class lE fan V-9A.
The following is the sequence of events performed as part of this test:
8/6/82 -
A recorder was set up to monitor four points inside the AFW pump room.
A recorder was in place behind the training building to monitor the outdoor temp-eratures.
8/23/82 - The test procedure received review and approval by individual PRC/QC members.
8/30/82 - The test procedure received Plant Manager approval.
9/10/82 - Test equipment was recalib~ated due to the long time lapse between installation of the equipment and the start of the test.
9/14/82 - Phase III testing started at 10:40 AM when the motor driven AFW pump was turned on.
The recorders were then turned on to monitor normal operating temperatures.
9/15/82 - The Motor driven AFW pump was shut off, after a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> run, at 1056.
The room was allowed to cool down until 1320 when the steam driven AFW pump was turned on, this started the second half of Phase III.
9/16/82 - The steam driven AFW pump was shut off, after a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> run, at 1325.
Phase III of the test was completed by obtaining the chart paper from the recorders for the test run from 1040 on 9/14/82 to 1325 on 9/16/82.
9/20/82 - Phase IV testing commenced which included starting the motor driven AFW pump, P8A.
The indoor recorder was also started.
The outside recorder was not functional but readings were taken by the test engineer approximately every two hours by observing the digital readout located behind the training building.
9/21/82 - Phase IV testing continued for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at which time the door to the AFW pump room was opened for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
At the conclusion of this 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period, an air driven blower was placed in the door of the room for approximately 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
These two steps were contingency steps in the procedure.
9/22/82 - The motor driven AFW pump was shut off and the door to the room was closed.
The ventilation to the room was restored by opening the damper and the room was allowed to cool down for approximately 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
The steam driven AFW pump was then started and the ventilation damper was closed.
This condition was maintained for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> except for brief interruption to allow the plant to perform a heat balance.
CONSUMERS POWER COMPANY Palisades Plant ATTACHMENT B 9/23/82 - At the conclusion of the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test, the door to the room was opened for an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period.
This step was a designated contingency step in the procedure.
It was decided not to run the air driven fan at the request of the plant.
The steam driven AFW pump was turned off, the door to the room was closed and the ventilation was restored to normal.
Summary of Test Results Phase III Attachments Bl and B2 show a summary of the recorded temperatures for outside and for 4 locations inside the AFW pump room.
Point 1 was the temperature near PT-0741D.
Point 2 was t.he temperature near PT-074lA.
Point 3 was the temperature at the motor, P8A.
Point 4 was the temperature near SV-0521.
These recordings were ta.ken with the ventilation system working normally.
From attachments Bl and B2, it can be seen that there was little difference in room temperatures between the motor driven pump run and the turbine driven pump run.
The motor driven pump results in the higher temperatures.
- Also, there seemed to be no correlation between outdoor temperatures and temperatures in the AFW pump room.
When the motor driven pump was tested, the room temperatures rose quickly to a point, then stabilized while the outdoor temperatures gradually decreased.
In the case of the turbine driven pump test, room temperatures rose to a peak and then slowly decreased while the outdoor temperatures were constantly decreasing.
Phase IV Attachments B3 and B4 show a summary of the recorded temperatures for outside and for 4 locations inside the AFW pump room.
The 4 locations inside are the same as those in Phase III above.
These recordings were taken with the v*entila-tion system damper closed.
Portions of this test also indcluded opening the door to the room and using an air driven fan for additional cooling.
From the summaries of temperatures, it can be seen that there was only a slight difference in room temperature between the motor driven pump run and the 2
turbine driven pump run with the motor driven pump resulting in higher temperatures.
This was probably due to the fact that steam supply valves to the turbine driven pump were lea.king which allowed the uninsulated exhaust pipe to add heat to the room while the motor was running.
Both pumps were operated at normal capacity (which is 300 GPM) with normal recirculation flow to the condensate tank.
150 GPM was flowing to each steam generator.
This required 107 amps on the motor for this flow rate.
150 GPM is the amount of flow required by Technical Specifications.
The test results also show that there was approximately a 20°F rise in temperature during the first 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at the lower elevations with the motor driven pump running.
They also show that there was no apparent correlation between inside and outside temperature cycles.
CONSUMERS POWER COMPANY Palisades Plant ATTACHMENT B Conclusions The AFW pump room ventilation test was conducted in two phases.
Phase III testing required that room temperatures be monitored and recorded during motor driven AFW pump operation with and without normal AFW pump room ventilation.
Room temperatures were also monitored and recorded during steam driven AFW pump operation with and without normal AFW pump room ventilation.
The phase III tests were conducted with the normal ventilation in operation.
These tests revealed little or no correlation between AFW pump room temperature changes and outside ambient temperature fluctuation.
During loss of ventilation tests (Phase IV tests) with the motor driven AFW pump in operation, it was found that the room temperature near the electric motor was the closest to the limit.
The test temperature at this location peaked at 121°F, or 39°F below the limit of 160°F.
During this test, the.outside ambient temperature was 6o°F.
This is 35°F below the FSAR design outside ambient temperature of 95°F.
Assuming a worst case possibility of room temperature increasing one for one with an outside ambient rise to 95°F, the room temperature would peak at 156°F or 4°F below the limit.
Opening the security door decreased the critical room temperature 7°F.
Loss of ventilation tests with the steam driven AFW pump in operation also showed the critical room temperature to be near the electric motor.
During the test, this temperature peaked at 116°F.
During the test, the outside ambient temperature was 59°F, or 36°F below the FSAR design outside ambient temperature of 95°F.
Again, assuming a worst case of room temperature rising one for one with an outside ambient rise to 95°F, the critical room temperature would peak at 152°F, or 8°F below the limit.
As before, opening the security door was an effective contingency lowering the critical room 0
temperature by 11 F.
The results of the Phase IV test indicate that no safety system in the room would experience ambient temperatures exceeding their limits for at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after the loss of ventilation.
These results are valid for either the motor or steam turbine driven auxiliary feedpump in operation.
Although no contingencies are required to keep the temperatures below the limit, opening the security door is an effective means to reduce the room temperature peak.
Finally, it should be noted that the Phase IV test results are considered conservative since the makeup air through the room door was very warm because of the operating nearby condensate pumps.
If an actual loss of off-site power occurred, the incoming air through the room door is expected to be substantially cooler.
The cooler room makeup air would result in room temperatures lower than those monitored during the Phase IV testing.
3
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~JLI 1/1s-e Consumers Power Company Palisades* Plant ATTACHMENT Bl e
Summary of Phase III - Test Temperatures with Motor Driven Aux Feed Pump On.
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JB3o 112 113 j /~ 123 75 1130 11'-j //3 Ji0 IZ3 7'-1 Z{)3t; l/Z 113 l/h 123 72.
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~nsumers Power Company tit Palisades Plant ATTACHMENT B2 Summary of Phase III - Test Temperatures with Steam Driven Aux Feed Pump On.
Loc.ATIOA.J
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Page 1 of 2 CONSUMERS POWER COMPANY Palisades Plant Attachment-B3 Summary of Phase IV test temperatures with motor-driven auxiliary feed pump on.
Location Date Time 1
2 3
4 Outside Operating Conditions 9/20/82 1350 93°F 93°F 91°F 105°F 60°F Start mtr drvn pump P8A and close ventilation damper.
1530 llO llO lll ll9 58 1630 ll2 ll2 ll3 121 1730 ll3 ll3 ll4 121 55 1830 ll4 ll4 ll5 122 1930 ll5 ll5 ll6 124 54 2030 ll5 ll5 ll7 124 2130 ll5 ll5 ll7 124 55 2230 ll6 ll6 ll7 124 2340 ll6.
ll6 ll6 125 51 9/21/82 0030 ll6 ll6 116 125 0130 116 116 116 125 48 0230 ll7 117 117 125 0330 117 117 117 125 51 0430 117 117 117 125 0530 117 117 117 125 49 0630 118 118 118 126 0730 118 118 118 126 50 0850 118 118 118 126 51 0930 118 118 119 127 52 1030 118 119 119 127 1130 118 119 119 126 1230 119 119 120 127 59 1330 119 119 119 127 1400 120 120 121 128 Open door to aux feed room.
1415 115 ll6 116 127 61°F 1430 114 115 115 125 1510 114 114 114 124 1530 112 113 114 123 1630 112 112 113 122 59 1730 111 113 113 122 1830 111 112 113 122 56 1945 112 112 113 122 2015 112 112 113 123 57 2130 112 113 114 122 2200 112 112 113 120 59 Placed air blower in door.
2300 110 111 114 113 rp1082-1624a-23-43
Page 2 of 2 Location Date Time 1
2 3
4 Outside Operating Conditions
~ -- --
9/22/82 0000 110 111 113 112 54 0100 109 110 113 112 0200 109 109 112 112 54 Stop motor and restore ventilation.
rp1082-1624a-23-43
e Page 1 of 1 CONSUMERS POWER COMPANY Palisades Plant Attachment B4 Summary of Phase IV test temperatures with steam-driven auxiliary feed pump (PBB) on.
Location Date Time 1
2 3
4 Outside 0Eerating Conditions 9/22/82 0630 95°F 97°F 96°F 107°F 48°F Start turb driven aux feed pump P8B and close*
ventilation damper.
0750 109 109 109 122 0905 110 110 111 129 49°F 0950 110 110 110 129 1110 111 112 112 130 57 1200 111 112 112 130
. 1230 111 112 112 131 1330 112 112 112 131 57 1500 112 112 112 131 61 1600 112 112 112 131 1710 112 113 113 132 60 1800 113 113 113 132 1905 113 114 113 133 60 2000 113 114 113 134 2200 113 113 113 133 59 2300 114 114 114 133 0000 115.
115 115 133 60 0100 114 114 114 133 0200 114 114 114 133 56 0300 114 114 114 132 0400 115 115 115 133 58 0500 115 115 115 133 0600 116 116 116 134 59 Open door to auxiliary feed room.
0700 106 109 109 130 0730 106 109 108 130 59 0830 106 108 107 130 0930 106 108 107 130 62 1018 105 107 106 130 1100 105 107 106 130 64 1255 105 107 106 130 66 1330 105 107 106 129 1350 105 107 105 129 Stop pump and restore ventilation.
rp1082-1624b-23-43