ML20033D348
| ML20033D348 | |
| Person / Time | |
|---|---|
| Site: | Clinton  |
| Issue date: | 12/01/1981 |
| From: | Geier J ILLINOIS POWER CO. |
| To: | John Miller Office of Nuclear Reactor Regulation |
| References | |
| U-0356, U-356, NUDOCS 8112070556 | |
| Download: ML20033D348 (15) | |
Text
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////NU/S POWER COMPANY L30-81 (12-01)-6 500 SOUTH 27TH 3TREET, DECATUR, ILUNots 62525 F
December 1, 1981
@/ /0)
Mr. James R. Miller, Chief g
Standardization & Special Projects Branch Division of Licensing 9
p, OgO-/
fi Office of Nuclear 'leactor Regulation U
I U. S. Nuclear Regulatory Commission o.* >g,,3 Washington, D. C. 20555 ttt
Dear Mr. Miller:
g Clinton Power Station Unit 1
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Docket No. 50-461 The attached material responses were discussed with Mr. Nick Fioravante during a meeting on November 30, 1981. These responses were found to be acceptable as stated and resolve the issues. The issues are as follows:
Reactor Coolant Pressure Boundary Leakage Detection Systems Equipnent and Floor Drain System Sincerely, h).
d J.D. Geier Manager, Nuclear Station Engineering Attachments cc:
J.it. Williams, NRC Clinton Project Manager H.H. Livennore NRC Resident Inspector N. Fiovarante, NRC ASB J.P. O'Brien it.M. Sroke S & L G.E.-Wuller J'5.h 8112070556-811201 PDR ADOCK 0500
r Issue Section 5.2.5 - Reactor Coolant Pressure Boundary Leakage Detection System 1.
Verify that the particulate channel of the leak detection system receives its power from a Class 1E source.
2.
Verify that radiation monitors will be installed to meet requirements of II F.1-1 and II F.1-3.
3a. What assurance is there that steam from " hot" sources will be condensed for leak detection monitoring purposes.
3b.
Discuss the surveillance program planned to minimize the potential for drain system blockage.
4.
Discuss how the operator will determin the amount of leakage by observing the indications available to him, including the need for unit conversion and maintenance of a record of background leakage.
Response
1.
The fission product monitoring system receives its power from a Class IE source.
2.
Item II F.1-3 is being answered under open licensing issue
- 77. Applicant is committing to installing high range gamma radiation monitors.
Item II F.1 High Range Noble Gas Monitor - Was not discussed with this reviewer.
3a. Ileat exchangers cool and condense the leakage prior to entering the sum -(M05-1046 sht. 4 and M10-1046 sht. 5). -
Temperature probes in the discharges from'the heat exchangers will provide remote verification of condensation.
3b. CPS will perform functional testing of the drywell floor drains.
See the attached proposed modification to NRC Standard Technical Specifications.
4.
A.
Quantifying Leak Rates in Ge Drywell 1.
1.
Floor Drains Sump Heasurenent - Unidentified Leakage -
Influent to this sump is passed through a weir box with instrumentation to monitor the. flow to the sump '
)
(M10-1047sh8). There is a flow recorder in the f
Response (cont'd) 4A 1.
control room that reads in gallons per minute and a integrating flow counter that reads in gallons. There is a rate-of-flow-increase alarm in the control room which meets the Reg. Guide 1.45 sensitivity reguirements.
The sump itself has a high-high level alarm that indicates in the control room.
Control room instrumentation monitors the on/off cycling of the sump pumps and provides an alarm if the Tech..Spsc. X10w rate is exceeded or. pumps. turn on.
2.
Equipment Drain Sump Measurement - Identified Leakage -
(same as measurement for Floor Drain Sump Measurement above) (M10-1046 sh 1).
3.
Drywell Cooler Condensate Crain - Unidentified Leakage.-
Condensate flow from the drywell coolers.(MG5-1109 sh 1).
is routed to the floor drain sump. The two upper drywell cooler condensate drain lines are monitored by flow transmitters (M05-1047 sh 8). This condensate flow is indicatsd in the control room in gallons per minute. An adjustable alarm is set to annunciate at a high flow rate approaching the Tech Spec. unider.tified rate liniit..
4.
Fission Product Monitoring The system continuously monitors the drywell atmosphere for airborne radioactivity (iodine, noble gases, and particulates).
In order to establish a relationship between the leakrate in the Drywell and the subsequent increase in airborne radioactivity, an empirical data base will be accumulated during power operations. This data base will consist of two parameters:
total unidentified leakrate (including Drywell cooler condensate flows) and the corresponding gross CPM increase as indicated by the Drywell Fission Product Monitor (DW-FPM). Once a statistically precise relationship is detennined, a curve will be generated on the basis of total leakage (gpm) vs. CPM rate of increase. Therefore, by knowing the gross increase in activity as detected by the DW-FPM, the corresponding leakrate into the Drywell can be determined graphically.
B..
Quantifying Leak Rates in Containment (External tu Drywell) 1.
Accessible areas are inspected periodically and temperature-and flow indicators are provided for the control room opera tor. Any indication of abnormal leakage wil1~ be investigated.
r Response (cont'd) l l
B.
2.
Floor Drain mump Measurement - Influent to this sump is passed through a weir box with instrumentation to monitor the flow to the sump (M10-1047 sh 7). There is a flow recorder in the control room that reads in gallon per minute and an integrating flow counter that reads in gallons. There is a rate-of-flow-increase alarm in the control room that meets the Tech. Spec. flow rate is exceeded or both pumps turn on.
3.
Equipment Drain Sump Measurement - (same as measurement on Floor Drain Sump above) (M10-1046 sh 1).
Action Required FSAR changes.
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REACTORC00LhNTSYSTEM
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T 3/4.4.3 REACTOR CO0lANT SYSTEM LEAKAGE
_ LEAKAGE DETECTION SYSTEMS LIMITING CONDITION FOR OPERATION 3.4.3.1 The following reactor coolant system leakage detection systems shall be OPERABLE:
', s The drywell atmosphere Q;;;c= 0 particulate) radioactivity a.
monitoring system, b.
The drywell sump flow monitoring system, and
.E+thac tim-(-drywell air coo 4ees-eendensate-f4cw -ratemordtering,jst.cr..'-
c.
er The drywell atmosphere (gaseous cr prtic_'ct;' radioactivity
~
monitoring system.
APPLICABILITY: OPERATIONAL CONDITIONS 1, 2 and 3.
ACTION:
.With only two of the above required leakage detection systems OPERABLE, opera-tion may continue for up to 30 days provided grab samples of the cyt inmcatPt.ip atmosphere are obtained and ar.lyzed at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> dken-the required gaseous and/or particulate radioactive monitoring system is inoperable; s
otherwise, be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
SURVEILLANCE REOUIREMENTS 4.4.3.1 The reactor coolant system leakage detection systems shall be demon-strated OPERABLE by:
e Drywell atmosphere particulate andAW gaseous monitoring sy' stem-a.
performance of a CHANNEL CHECK at least once perWhours, a CHANNEL FUNCTIONAL TEST at least once per 31 days and a CHANNEL CALIBRATION at least once per 18 months.
b.
Drywell sump flow monitoring system performance of a CHANNEL FUNCTIONAL TEST at least once per 31 days and a CHANNEL CALIBRATION TEST at least once per 18 months.
D. y-el'rebelors-condensate ficw rai.e munii.vring -eystem-perfomanca.
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Section 9.3.3 -' Equipment and Floor. Drain System l'rovide the following:
1.
Process and instrumentat-lon diagrams for th? equipment and. floor. drainage system; c;.., w.j.
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the: capacities of sumps,
Response
- 1.. The following P&ID's showing the equipment and floor drainage system were given'to the NRC*
M05-1046 Drywell, Cont. & Aux. Bldgs M05-1053 Turb, Control, Radwaste Bldgs M05-1047-Drywell, Cont < & Aux. B1dgs -.
M05-1054 Turb, Control, & Radwaste Bldg.
'M05-1083 Laundry Drain System
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The breakdown of expected leakage (influx) rates can be
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Table 1 lists th~e capacities of sumps, drain tanks.an'd'
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' Sump Drains to RW System Floor Drain Collector Tank lWFOlT Effective Flooded Pumo Sump Sump Pump Capacity Capacity Capac'ity No.
Descriptior.
No.
Gallons Gallons _
GPM 1RF03T Drywell Floor Drains 1RF03PA 194 3804 50 50 PB 1RF07T Contaimment Floor Drahu; 1RF07PA 119 419 50 50 PB 1RF06T Au:t. Bldg. Drains 1RF06PA 209 730 50 50 PB 1RF02TA LPCS Room Drai'as 1RF02PA 209 610 50 50
(
PB 1RF02TB RHR Pump Room A 1RF02PE 209 586 50 50 PP 1RFC2TC RCIC Equip. Room Drains 1RFO?rG 197 586 50 50 PH 1RF02TD RHR Pump Room B 1RF02PC 209 586 50.
50 PD 1RF02TE RHR Pump Room C 1RF02PJ 209 610 50 50 PK 1RF02TF HPCS Room Drains 1RF02PL 219 598 50 PM 50 oTF02T Radwaste Bldg. Floor Dr.
OTF02PA 227 1005 100 100 PB 1TFnlT Turbine Bldg. Floor Dr.
1TF0lPA 292 1870 50 50 PB I
1RF04T Fuel Blds Floor Drains 1RF04PA 292 1458~
50 50 PB 1TF12T Control Bldg. Floor Dr. 1TF12PA 2f 7_
1226 50 50 PB i
2TF12T Control Bldg. Floor Dr. 2TF12PA 247 1226 50 50 PB j
OTF03T
. RW Bldg. Of fgass Fl.Dr. 'OTF03PA 157 927 50 50 PB (lW20lT & lW202T)
Sump Drains To RW Chemical Waste Collector Tanks 1&2 OTF10T Chemical Waste Area
'OTF10PA 242~
1185 50 PB 50 Floor Drains l
1TE05T CP High Cond. Drains 1TE05PA.
584 1907
_200 200 PB f-I k
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TABLE 1
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Effective Flooded Pump Sump Sum; Pump Capacity Capacity Capacity No._
Descrip_lon No.
_ Gallons Gallons GPM Sump Drains to RW Equipment Drain Collector Tank lWE0lT 1RE03T
'Drywell Equip. Orains 1RE0 3Pt.
186 772 50 PB 50 1RE05T Contain. Equip. Drains 1RE05PA 177 478 50 PB 50 1RE04T Fuel Bldg. Equip. Drahm 1RE04PA' 323 1365 50 PB
'50 1TE03T Control Bldg. Equip. Dr.lTE0 3PA 227 1047 50 PB 50 2TE03T Control Bldg. Equip. Dr.2TE03PA 227 1047 50 PB 50 1TE0lTA Turb. Bldg. Equip.
1TE0lPA 132 1077
' 50 Drains N.
PB 50 1TE0lTB Turb. Blds Equip.
1TE0lPC 132 1077 59 Drains S.
PD 50 OTE02T Radwaste Bldg. Equip.
OTE02PA 239 1149 50 i
Drains PB 50 Sump Drains La RW Equipment Drain Surgo Tank lWE02T ITE04T CP Low Cond. Drains 1TE04PA 959 3366-300 PB 300 Sump Drains to RW Laundry Drains Collector Tanks ONY0lTA,B ODLO'lT Laundry Area Fl. Dr.
ODLO1PA 257' 789 EG i
PB 50.
Drains From Make-Up Demineralizer to j2 Sedimentation Pond
,'t OTF05T Make-Up Demin Waste Dr. OTF05PA 1320.
'2488 150 PB 150 PC 150 Sump Drainage to Yard Manholo
- 165
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1TF14TA Diesel Gen. Fuel 1TF14PA 759 2057 250 j
Tank Room Drains
.PB 250 1TF14TB PC 759 2057 250 PD 250.
l llTF14TC PE 759 2057 250
.PF 250-3
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' d;k TABLE.1
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y (Cont'd)
'ip Effective Flooded Pump Sump
' Sump Pump Capacity capacity Capacity No.
Description No.
Gallons Gallons GPM Sumps Draining to Yar_1 Manhole ? JJ4 2TF14TA 9iesel Gen. Fuel Stor-2TF14PA 759 2057 250
/ age Tank Room Dr.
PB 250 2TF14TD PC 759 2057 250 y
PD 250 2TF14TC PE 759 2057 250 PF 250 i
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Drain Overflow Tank Working capacity No.
Drain Tank Description Capacity Gallons Drain Tank:, to RW System Collector Tank lWF0lT (Floor Drains) '_
1RF05T Aux. Bldg. Floor Drains 4952 5250 1RF0lT Fuel Bldg. Floo Drains 4386 5800 1TF06TA Turb. Bldg. Floor Drains 4386 5033 1TF06TB Turb. Bldg. Floor Drains 4386 5033 OTF0lT Radw. Bldg. Floor Drains 3325 4012 Drain Tanks _f.o RW-Cherreea-l-Wante"f anks--lW20-lT-&--lW-20 2T
.None:---Direct,--Pumping-from-Sumps-0TP10T 5 1TE65T Drain Tanks to RW Equip. Drains Collector Tank lWEOlT 1RE0lT Fuel Bldg. Equip. Drains 4987 5907 1TE02T Turb. Bldg. Equip. Drains 4669 5912 OTE0lT Radw. Bldg. Equip. Drains 1535 2039' ZDritle-hnka LO-RW-E<pki-m-Brh4urgc Tonh---lWE097
..None --. Eumpinydireeb-ly from-Cume iTE&4T
, Drain-Manks to..RW. Laundry-Drarns-Co-1-lector.-Tanks--OWYOITAyB None:
Pumping directly from pump-ODLOlT.
4 0
r S
9 e
. -