ML17319A477
| ML17319A477 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 06/26/1980 |
| From: | Dolan J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0578, RTR-NUREG-578 AEP:NRC:00307C, AEP:NRC:307C, NUDOCS 8007020591 | |
| Download: ML17319A477 (19) | |
Text
ACCESSION NBR FACIL:50-315 50"316 AUTH'Ai~F DOLANPJ ~ ED REC I P. VAr E DENTVNEH ~ RE REGULATORY INFORMATION DIS TRI BUT ION SYSTEM (RIOS)
- 8007020591 DOCS DATE
- 80/06/26 NOTARIlEO:
NO Donald C ~
Cook I'nuclear Power Pl antE Uni t 1F Indiana 8,
Donald C,
Cooic Nuclear Power PlantF Unit 2F Indiana 8,
AUTHOR AFF ILIA T ION Indiana 8 Mich.iqan Electri,c Co.
RECIPIENT AFFILIATION Office of Nuclear Reactor Requlationr Director DOCKET 05000315 40071
SUBJECT:
Forwards response to request concerninq add'I info on responses to NRC short term requirements for auxiliary feedwater sys.
AOO IS COPIES RECE IVES:LTR j ENCI. Q SI ZE:~
TITLE: General Distribution for after Issuance of Operatinq Lic NOTES:~tE:
Z Ga~<%
RECIPIENT IO CODE/NA<E ACTION:
BC PQ'~ 5 05 I
INTERNAL: A/0 CORE rr CS21 EMERG PREP 16 IFE 12 NRC POR 02 OR ASSESS BR 19 P
01 COP IES LTTR ENCL 1
1 0
1 0
2 2
1 1
1 0
1 1
RECIPIENT ID CODE/NAME Pl PI'WrR, 5 CHEM ENG BR 17 HANAUERFS ~
20 MOOREFV ~
22 OELO 14 QA BR 15 COPIES LT lR ENCL 6
6 1
1 1
1 1
1 0
1 0
EXTERNAL: ACRS I'SIC 20 04 16 1
1 LPOR 03 JUg J ]ging fo TOTAL NURSER OF COPIES REOUIREO:
LTTR Pf ENCL
INDIANA I!t MICHIGAN ELECTRIC COMPANY P. O.
BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. I0004 Donald C.
Cook Nuclear Plant Units 1 and 2
Docket Nos.
50-315 and 50-316 License Nos.
DPR-58 and DPR-74 June 26, 1980 AEP:NRC:00307C Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Denton:
The attachment to this letter responds to requests from members of your staff concerning additional information on our responses to the NRC requirements for the Auxiliary Feedwater System (AFS) in the Donald C.
Cook Nuclear Plant transmitted to us via Mr. Eisenhut's October 30, 1979 letter.
Very truly yours, ohn E. Dolan ice President cc:
R.
C. Callen G. Charnoff R.
S. Hunter R.
W. Jurgensen D. V. Shaller - Bridgman ool 5
8 oovoso 59(
ATTACHMENT TO AEP:NRC:0307C In preparing this attachment we have used the same format as that of Mr. Eisenhut's letter of October 30, 1979.
Additional Short Term Recomnendation No. 1:
Me were requested by the NRC staff to document the information provided during recent telephone discussions concerning this recommendation.
The time spans for the operator to respond to the various combinations of'redundant) alarms on the condensate storage tank level with the largest capacity auxiliary feedwater pump running (900 gpm) are listed below.
These times assume no condensate makeup is provided to the condensate storage tank (CST).
A)
Hi alarm to Lo alarm
- 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and 42 minutes B)
Lo alarm to Lo-Lo alarm
- 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and 26 minutes C)
Lo alarm to Auto AFl< pump trip
- 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and 1 minute 0)
Lo-Lo alarm to Auto AFll pump trip - 35 minutes The pneumatic air selector switch is a Foxboro Model 38360 two (2) position, four (4) port transfer switch.
Figure 1 depicts the materials of construction, schematic tubi ng arrangement and physical outline of the switch.
Port 81 is used for one train of level indication tubing and is designated as CLR-110.
Port 83 is used for the redundant train of level indication tubing and is designated as CLR-111.
Port 84 is used for the recorder connection while Port <2 is plugged.
The 'manual'osition of the switch connects CLR-110 to the recorder and the 'automatic'osition connects CLR-ill to the recorder (the actual switch mounted on the panel has on it desi gnations CLR-110 and CLR-ill, respectively).
The power supply or the control room annunciators/alarms is from the 250 volt station batteries.
The respective alarms for CLR-110 and CLR-ill are powered electrically by DC power bus CAB-AFC-1.
The alarm modules are Mercoid and United Electric pressure switches located in the back of the main panel on its respective train of pneumatic tubing between the sensor and the pneumatic air switch.
All single failures which could affect the CST level indication would result in actuating the Lo and Lo-Lo alarms on one or both trains.
By procedure after verifying a true alarm, the operator will switch to the backup water source (EHS) for auxiliary feedwater supply upon actuation of the alarms.
This action places the AFS into its most conservative mode of operation whether or not there is water in the CST.
- Further, the automatic low suction pressure pump trip being installed in response to NRC recommendation GL-4, trips the pump independently of the CST level indication and alarms.
This auto pump trip,is itself alarmed.
In the event that the operator does not adequately respond to the CST level indication and alarms during the time span from the Lo-Lo alarm to pump trip, pump damage due to loss of suction is prevented automatically by the trip unction.
Additional Short Term Recommendation No.
2 The 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> endurance testing will be performed on all auxiliary feedwater.pumps in both Units 1 and 2 by December 31, 1980.
Results of the tests will be reported, as outlined in recommendation No. 2; within 60 days of completion of the testing of all six (6) auxiliary feedwater pumps in Units 1 and 2
I
0 items'F 2 STANDARDSPEClFICATIONS (Single Plug-Type AirSwitch)
Body Forged brass Connections Tapped for 1/4, NPT, numbered for identification.
Mounting Panel up to 6.5 mm (0.25 in) thick or open tsiping.
Handle Cast
- brass, chromium plated.
Removable for adjustment to nalne Plate position.
Nlaximum Pressure 1 MPa [150 psi;10 bar or kg/cm2).
(Allowable leakage 10 cubic centimetres per minute between ports and from interior to atmosphere.)
Switch Combination See Table 1 for positions and port configuration.
TABLE 1 Part Number Type Connection Combinations Rotation l clockwise)
Front View Schematic
~ 0038360fa) 2.Position 4-Port Double Angl~ Plug 1.2, $4 or 2.3, 14 fe) Part Number shown is for switch withoutnameplate...
SINGLE SW)TCH I
, Qei I
I L
l'OR7' OE'I/)CD Cauli)eCTea 1
CLR- /lQ 2
PLLL,C GED 3
CLR - lll RECORDER j)qgpL p z, crro jc, rVrrckd~ Pl4ur J
r I
I r
I
\\
0
REGULATORY ORMATION DISTRIBUTION SYb M (RIDS)
DO NOTES:~<f:
Z, ~ >
dC MWh~4 ACCESSION NBR:8007020591 DOC,DATE+ 80/06/26 NOTARIZED:
NO FACIL:50"315 Donald C,
Cook Nuclear Power Plantr Unit ii Indiana 8
50-316 Donald C.
Cook Nuclear Pow'er Plantg Unit 2i Indiana L
Ob000316 AUTH BYNAME AUTHOR AFFILIATION DOLANEJ ~ ED Indiana 8 Michigan Electric Co, RECIP ~ NAME RECIPIENT AFFILIATION DENTONEH.R, Office of Nuclear, Reactor, Regulationr Director
SUBJECT:
Forwards response to request concerning addi info on responses to NRC short~term requirements for auxiliary feedwater sys
~
DISTRIBUTION CODE:
AOOIS COPIES RECEIVED:LTR /
ENCL Q SIZE:
TITLE: General Distr ibution for after Issuance of Operating Lic EXTERNAL: ACRS NSIC 20 00 RECIPIENT ID CODE/NAME ACTION:
BC @g~ 5 05 INTERNAL: A/D CORE 8
CS21 EMFRG PREP 16 ILE 12 NRC PDR 02 0
SS BR 19 01 COPIES LTTR ENCI.
1 1
0 1
0 2
2 1
1 1
0 1
1
'I 16 16 1
1 I.PDR 03 RECIPIENT ID CODE/NAME P M pj/JYFgi 5 CHEM ENG BR 17 HANAUERtS, 20
- MOOREFV, 22 OELD QA BR 15 COPIES LTTR ENCL 6
6 1
1 1
1 1
1 1
0 1
0 1
1
/o TOTAL NUMBER OF COPIES REQUIRED:
LTTR Pf ENCL
0 I'I
INDIANA L MICHIGAN ELECT'RIC COMPANY P. O.
BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. 10004 Donald C.
Cook Nuclear Plant Units 1 and 2
Docket Nos.
50-315 and 50-316 License Nos.
DPR-58 and DPR-74 June 26, 1980 AEP:NRC:00307C Mr. Harold R. Denton, Director Office of'uclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Denton:
The attachment to this letter responds to requests from members of your staff concerning additional information on our responses to the NRC requirements for the Auxiliary Feedwater System (AFS) in the Donald C.
Cook Nuclear Plant transmitted to us via Mr. Eisenhut's October 30, 1979 letter.
Very truly yours, ohn E. Dolan ice President cc:
R.
C. Callen G. Charnoff R.
S.
Hunter R.
W. Jurgensen D. V. Shaller - Bridgman o oovooo59'(
oo) 5 if)
t "4
~
~
F
ATTACHMENT TO AEP:NRC:0307C In preparing this attachment we have used the same format as that of Mr. Eisenhut's letter of October 30, 1979.
Additional Short Term Recoranendation No. 1:
We were requested by the NRC staff'to document the information provided during recent telephone discussions concerning this recommendation.
The time spans for the operator to respond to the various combinations of (redundant) alarms on the condensate storage tank level with the largest capacity auxiliary feedwater pump running (900 gpm) are listed below.
These times assume no condensate makeup is provided to the condensate storage tank (CST).
1 A)
Hi alarm to Lo alarm
- 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and 42 minutes B)
Lo alarm to Lo-Lo alarm
- 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and 26 minutes C)
Lo alarm to Auto AFW pump trip
- 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> and 1 minute D)
Lo-Lo alarm to Auto AFW pump trip - 35 minutes The pneumatic air selector switch is a Foxboro Model 38360 two (2) position, four (4) port transfer switch.
Figure 1 depicts the materials of construction, schematic tubing arrangement and physical outline of the switch.
Port Pl is used for one train of level indication tubing and is designated as CLR-110.
Port 83 is used for the redundant train of level indication tubing and is designated as CLR-ill.
Port 84 is used for the recorder connection while Port 82 is plugged.
The 'manual'osition of the switch connects CLR-110 to the recorder and the 'automatic'osition connects CLR-111 to the recorder (the actual switch mounted on the panel has on it designations CLR-110 and CLR-ill, respectively).
The power supply for the control room annunciators/alarms is from the 250 volt station batteries.
The respective alarms for CLR-110 and CLR-ill are powered electrically by DC power bus CAB-AFC-1.
The alarm modules are Mercoid and United Electric pressure switches located in the back of the main panel on its respective train of pneumatic tubing between the sensor and the pneumatic air switch.
.All single failures which could affect the CST level indication would result in actuating the Lo and Lo-Lo alarms on one or both trains.
By procedure after verifying a true alarm, the operator will switch to the backup water source (EWS) for auxiliary feedwater supply upon actuation of the alarms.
This action places the AFS into its most conservative mode of operation whether or not there is water in the CST.
- Further, the automatic low suction pressure pump trip being installed in response to NRC recommendation GL-4, trips the pump independently of the CST level indication and alarms.
This auto pump trip.is itself alarmed.
In the event that the operator does not adequately respond to the CST level indication and alarms during the time span from the Lo-Lo alarm to pump trip, pump damage due to loss of suction is prevented automatically by the trip function.
Additional Short Term Recommendation No.
2 The 48,hour endurance testing will be performed on all
,auxiliary feedwater pumps in both Units 1 and 2 by December 31, 1980.
Results of the tests will be, reported, as outlined in recommendation No. 2; within.60 days of completion of the. testing of all..six (6) auxiliary feedwater pumps in Units 1 and 2
0 h
P
STANDARDSPECIFICATIONS
'Single Plug-Type AirSwitch)
Body Forged brass Connections Tapped for 1/4
- NPT, numbered for identification.
Mounting Panel up to 6.5 mm (0.25 in) thick or open 1siping.
Handle Cast brass, chromium plated.
Removable for adjustment to name plate position.
Maximum Pressure 1 MPa (150 psi;10 bar or kg/cm2).
(Allowable leakage 10 cubic centimetres per minute between ports and from interior to atmosphere.)
Switch Combination See Table 1 for positions and port configuration.
TABLE 1 Part Number TVpe Connection Combinations Rotation (Clockwise)
Front-View Schematic
- 0038360(a) 2.Position 4.Port Double Angle Plug 1.2, 3-4
~
or 2-3, 1.4 Ia) Part Number shown is for switch without nameplate.
SINGLE SWITCH I
I I
ronT ~
1 2
3 ANAL>
Q8 @
DE')/JCE CDhlkECTED CLR-IIO PL 0.AGED f" LR-Ill RECDRDER
- z. <cop Nu~eyw Placer ta~
I I
I I
I I
t
1