ML20031D256
| ML20031D256 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 10/07/1981 |
| From: | Vincent R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Crutchfield D Office of Nuclear Reactor Regulation |
| References | |
| TASK-05-05, TASK-5-5, TASK-RR NUDOCS 8110130185 | |
| Download: ML20031D256 (6) | |
Text
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Oe C011Sumers Bily General offices: V12 West Michleen Avenue, Jackson. MI 49201 *(517) 788-0650 M
eum
[
October 7, 1981 l R[h g L
3 OCT 9 gggy, G Director, Nuclear Reactor Regulation DgAfggy Att Mr Dennis M Crutchfield, Chief 1
Operating Reactors Branch No 5 US Nuclear Regulatory Commission Washington, LO 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLAIT - SEP TOPIC V-5, REACTOR CCOLANT PRESSURE 30UNDARY LEAKAGE DETECTION Ey letters dated March 10, 1981 and July 16, 1981, the NRC transmitted for co: cent draft evaluations for SEP Topic V-5 for the Palisades Plant. The following consents and attached information are provided in response to these documents.
1.
Regulatory Guide 1.h5 states that systems used for detecting leakage from the PCS should be able to detect a one gpm leak within one hour.
This guideline is arbitrary, and is impractical in many cases,. parti-cularly in light of the cany variables which can affect the sensiti-vities of these systems.
Even though some of the systems used at Palisades do not have this level of sensitivity, plant experience has shown that the installed,s;rstems are adequate to detect small leaks.
We believe that the diversity of systems and methods used meet the l
intent of existing guidance documents.
2.
Attached are updated tables (from URC letter of 7/16/81) to which missing information has been added. Also attact t d is a copy of the PCS inventory calculation sheet which is used to very neurately determine PCS leakage en a daily basis.
h TN 7
Robert A Vincent Staff Licensing Engineer CC Director, Region III, USNRC NRC Resident Inspector - Palbades 0
Bi10130185 811007 PDR ADPCK 05000 P
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f j
lif ACTOR C001 ANJJRE55tlRE BJIADARTAFAGE DETECTION SYSTEMS Requlatory Culde 1.43 Reewirements Plant: Palisades
_ Tat.le 1 :
Time Req'd Earthquake for Control Room Document-Teste:.
H.i h.t..t.o..C_ o_n. t a l em_ _ie_n.t-Leak Rate to Achieve Which Function Indication For atton Hef-D*,ing Nar-System incorporatej Sensitivity Sensitivity Is Assured Alarms & Indicators erence sal Operitton I) Sunv tevel Monitoring (Inventory)
Yes
- 25 gpm I tir.
0 3 4
t No
' Water 13.1 rained by gravity through two NC remote-ly operat ad isolation
- 2) Sump Pump Actuations no valves. Operator ac tion is requ red to drain mn,p.
MonitortngytmeMeters)
- 3) Alet.orne Particulate kalloactivity Monttoring a
.03 gem
" 45 min.
- 4) A r oree. scous Yes
.14 g V Yes
.l. 3 Yes
_ pailioactivity nunttoring Level Flow Hate FCAR (PT/P11807[ 1BTJ,~7f/PlA 1014,1017
~
Lplan20gpm Yes geet 6 no
- 5) Cundensate Flow Rate reater Switch Inom Air Coolers b.3.2.1 See Referenced FSAR Amen <
Q 17 'n N2es-6 Conta trunent Atmosphere yes FSAR Ament 17 Yes tic >
.0 No (FSAR I
h enure Monitorin.,
M ^*Hd-Section (HI 1812' Aten{phere! 15)
- 15. Question 13 lh un t a ltupent Ye s
- 2.5 gju I hr.
liumtalty Monitorin.
Yes i,3 No 9.8.2.1) 7)
~ ~1'U ~i6ff,~ fE,1i, 15 )
1 0.217 E H
- 8) Containmerit Atmosiihere Y.es
- Unki own -
0.067 g V Yes No Icmperature Monitoring CPCo ltr.
f0SVO"and
- 9) Acu.stic Emissions None Yes 12/19/80 No Unknown Safeties
- 10) Holsture Sensitive Tape 3
euk;ala[f0N81E ucattur vessel ilange Pressuru Vol une 130 ir: steam for inner seal 2 III Vol me 35 in liquid for outer sealg gs P
- 15 4uestion No and o.ain tant level lietectors Yes y,,
3
%etely Valve anit l'OllV Seat t eakage Ima but i W h ud.
Yes I
Ouc5'iaa No via leag.cr a tus e Honolue s Yeh uk Vn 4.3
' !{NP.b.lIl'y".lllIU'il'll9 'lE Mujeakager stated in the referenced documentation by tal min. Lo ;rt"t the constant rate I
l t
- 1 1.....
... i s r ii y.....I ae
.t.....t ni.n on o m,4,ggon ng g7 ga g g,,,g 9 9,,y,
I 3
IIIACIRC00lANLPRE55tillr 00tlH0AltV_L EAW.E del [Cil084 SYSIIHS, ite3ulatory Guide 't.45 Hequirements Plant: Palisades 1
gle{:
Inter;ystem leatg e~
'Hethods to Ilse Req d Earth uake for Control Itooin Document-Testabl I T
lleasure flCPB Leak Rate to Achievr.
Which sinction Indication for allon itsf-During flor-
- '~-
Syshms Which Interface w/ RCPB In-teakage Sensitivity Sensitivitr is Assured Alarms & Indicators crence nial Operat.
'3 mend.
j Air E. lector 5;;Quesdon Yes*
II 5etonitary' System (RIA-0631) liad. Monitor
<5 gpm ves D15Ghwn Rad.
SAR Amend.
- 2) Secondary System (RIA-2320)
Monitor
< 5 spa ves
- 5. Question Yes*
l.3 I/6/70 AlC Stl-l
- 3) Component f ooling Water System Red. Monitor Yes
,ect. 3.10, ai d ye3*
i (RIA-0915)
. /1;/19 tiltC 1I r,
- 0. % g H yzify,,Q (9l," * ^
(LIA-0917) surge gaek
- 4) Component Cooling Water System Level U.,known 0.133_ g V Yes
' o CPCo re: st P Yes Seal leak-?ff
- 5) Control Rod Drive Hechanisms Line Therm cout le % gpm Yes No q,,
d.3 and 6I Ject 3.3.h.2 1) it)
- See FSAR Sect. 11, Table 11-ti for these and other installed pr< cess 9I radiation monitor:
10) 12) 4
RE ACIOR COOL ANT PDF55UBE_80lN40ARVJEAkAGE ffTICTI0tt Sy%Tf MS Regulatory Guide 1,45 Requirements table 3:
&nt:
Palisades 8Hd I vEntory flalance t oak 144te Sensitivity 4I 9lallt
~
foriesponittnq lime Required to Achieve te nsitivity l
- tioimal insentory Check lustruvientation Hequired will6 Corresponding location: NA tarthipiakt For Which Instrt aentation liardware functioning 15 Assured:
NA Testable abs ing Norimal Operation:
NA tiocisnentation Heference: ISAN Amend. 15. f)oestion 4.3, Palisades Daily PCS Inventory Calculation Sheet
' Approved M1 Lt.
DAILY PCS INVENTORY Date Tims REV 2 PRC 0.,trebsr 10. 1974 Reviewed by Shift Superviser Additions:
Diversions:
I PMW B.A.
LETDOWN SEALS
- 6.
PCS T**. previous MAKEUP MAKEUP TO R.W.
TO PDT 7.
PCS T"", present (FQl-(FQl-(FIC0202 (FR 0133 8.
TIME 0210A) 02108)
X MINUTES
& 0143 X 9.
X-l.125**
MINUTES) 10.
= % Pressurizer level I
A B
C D
Change due to Change in Tav 11.
% Pressurizer level, previous
+
12.
Equivalent % Press-urizer Level 13.
% Pressurizer Level, present 14 Difference %
I 15.
X 65.56**
16.
Difference, Gallons VCT LEVEL 17.
Previous 18.
Present 19.
Difference %
i 20.
X 34.415 21.
Difference Gal.
I 22 Pressurizer Difference I
- 23. Sum Net Volume Diff.
I 24.
Flow Difference i
25.
Sum Net Change d
- 26. Net Change
+ I440 =
27.
Leak Rate GPM (Negativeleakrateindicates increase in PCS inventory) su ot.: (la)
(Ib)
(Ic)
(Id)
- FR 0133 & 0143: 100% = 3.5GPM (2a)
(2b)
Pressurizer Level: 1% = 65.56 gal.
(3a)
(3b)
VCT Level: 1% 34.415 gal.
Totals (4)-
Diversion Total
- These constants only applicable at rated conditions.
Difference (5) from flow integratione Do not take this data within two hours of finishing cont. bigg. purge or opening of a cont. b1dg. cooler valve:
HI 1813 Total Number Recir.
PCS Xe conc.
(from daily chem l33 Hi 1814 Fans Running:
lab report)
Total
+ 2 = AVG Humidity Coat. Bldg. Gas Tl 1813 Rad Mon RIA 1817 a'
hrs.
Tl 1814 Cont. Bldg. Gas taj Rad Mon RIA 1817 4
- hrs, no
+ 2 = Avg Temperature l33 Offgas Xe ccnc.
(from daily chem lab report
oRIMARY COOLANT LEAKAGE DETERMINATIONS A.
Humidity:
leak gpm =0.225 F (D -D )
02 = 13.27 2 600 i
2 Where Dl= water vapor density from graph at avg.
C.B. temperatere and humidity, and 0 = water vapor 2
density f rom graph at 100% R.H. and C.B. Air Cooler outlettemperature(nominally 600 F: to be determined weekly f rom V.3 and V.14 outlet TI), and F = number of containment air ccoler fans in operation.
B.
Radioactivity:
leak gpm = 1.23X107 (A2~AI l
(B) (T)
The terms of this formula are:
l33 A = C.B. Ai r Xe activity from RI A 1817 in A Ci/cm3 9 two times ~ 60 minutes apart:
EXACT TlHE f rom other side of form
( A = lst reading, A = 2nd reading) i 2
l33 B = PC Xe activity f rom la'b sample in ACi/ml T = Time between air samples in minutes C.
Primary to Secomdary:
leak gpm =(Offgas cfm) (7.t48 E), where E
l33 B = PCXe activity from lab sample in A Ci/ml l33 3
E =0ffgas Xe activity from lab sample in ACi/cm Plot of peak calculations: The instruction SS will complete the calculations in A, B, &C above using figures supplied on thc daily PCS Inventory sheet, and plot them together with the leak rate f rom thay
~
sheet on the graph in the file folder for the completed PCS Inventory l
sheets.
Plotted will be:
Leakage, f rom PCS Inventory l
Leakage, f rom sum of Humidity and Pri-Sec Leak Leakage, from sum of Radioactivity and Pri-Sec Leak Leakage, from Primary to Secondary l
t
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