ML20086P774
| ML20086P774 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 12/19/1991 |
| From: | Zach J WISCONSIN ELECTRIC POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| CON-NRC-91-149 VPNPD-91-445, NUDOCS 9112270192 | |
| Download: ML20086P774 (17) | |
Text
/
' Electnc POWER COMPANY
' 231 W Meh4m Po Box 20% Mdwouk;p W S3201 -
l4141221 2345 VPNPW 91-445 NRC-91-149 December-19, 1991 U.-S.
NUCLEAR REGULATORY COMMISSION Docament-Control Desk
-Mall Station'P1-137 i
Washington, D.
C.
20555
-Gentlemen:=
l DOCKET 50-266 i
RELIEF REOUEST FOR THE SECOND
-IN-SERVICE INSPECTION INTERVAL
-POINT BEACH NUCLEAE_ PLANT, UNIT 1 In -accordance with 10 CFR 50.55a(g) (5) (iv), Wisconsin Electric Power Company' requests relief from Section XI of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, " Rules for In-Service-Inspection of-Nuclear Power Plant
-Components," 1977 Edition with-Addenda, through and including
-Summer 1979.
The requirements for which relief is requested apply-to the second in-service-inspection interval for-Point Beach Nuclear Plant, Unit 1.
This interval ended December 20, 1990.
Relief Requests RR-1-14 and HP-RR-1-01 through_10 are attached l-and provide the information-needed for the NRC to complete a review and approval-as required..
Very truly yours,4 g
-47
/
l l(v,A Ja es J.
Zach Vice President Nuclear Power
\\
Attachments Copleslto NRC Regional Administrator, Region III NRC Resident Inspector 0
g 9112270192'911219 PDR - ADGCK O'3On0266 G
.4 subsWwrofHiumm Dww Ov;watin
r 1
[ -y l
PBNP UnR 1 RR 114 s
COMPONkNI Containment Sump Valves EXAM AREA 1.
. SI-850A - Valve Body Welds 2.-
St 850B' Valve Body Weids ISOMETRIC or COMPONENT DRMNQ Figure 1 Steams-Roger Drawing 8551/4, Sh.1 Figure 2 ; Stearns-Roger Drawing 8551/4, Sh. 2 -
= Figure 3 4 B-12 Figure 4 B-13 ASME SECTION XI CATEGORY
- C4 ASME SECTION X1 ITEM huanBER C6.20 l
ABME SECTION XI EXAMINATION REQUIREMENT Perform a surface examination during each inspection interval of the valve body welds of at l' east one
~ valve within each group of valves that are of the same size, design, function and service in a system.
The examination may be performed from the inside o the outside surface of the valve, ALTERNATIVE EXAMINATION The accessible portions of the valve body walds of one valve will be examined in accordance with the Code to the max! mum extent practical. In addition, both of these valves will be subjected to periodic system and hydrostatic pressure tests in accordance with IWA-5000 and IWC-2500-1, The valve body consists of two 10-in. diameter straight sections of seam welded Schedule 40 Type 304 stainless steel pipe and one elbow welded together circumferentiaily. The lower portion cf the valve includes a longitudinal seam weld with a circumferential weld at each end. These welds will receive a surface examination from the exterior in accordance with the Code.
The upper port!on of the valve has a longitudinal seam weld (approximately 11 feet in length) that, except for approximately 4 inches, is inaccessible from the exterior since it is embedded in concrete.
l-1
O The 4 in. longitudinal seam on the upper portion that is eccesslldo will teclove e surfac9 examiration.
The intogthy of the remaltdor of the upper portion will be verlilod during system hydrostatic and fu ctional pressure tests.
BEMQ1tEQ1LLtMLIA11011 The upper portlan that is emtxdd(d in concrete can not be moaningfully examinod frr.rn the insido using a surface sumirmtlon method due to the longth ard the diamotor (10-in) of the velve. The valvo will teve to be disassemtdod ard the plug ard stem removed in order to complete the examination. The disassomtdy of those valves for the sde purpose of examtration would result in unnocessary exposure to radbtlon a:d contamination aid h entrary to ALAhA guWotinos. The examination would do little to add to the assi. trance of the structural intogthy of those valvas sinco they are subjectJd to system and hydrostatic pressure tests on a regular tvals in accordance wkh IWMiOOO and IWC 2500 t. The valvo, therefore, shou:d not be disassomtdod fut the solo purpose of this examination.
A
. -.. -. -. - -.... ~ _
l Figure 1 la(Vat:B9SM Drawirm 'fr aber 69151/4. Sh._1 S
9 I
4 i d
't h
"i T 1,i c.
}
t 5
t N c.....
L -l (,b $
j
\\ilI f N h Y hk a
y it s
ip n,
h-4, s i
'l;y le
,1! -
4
[ll)!;J up s
' i) f l;
b s,, d, he,.
jlj o,j i!
i Ja' I
5a
- i.. p
.lp L
3
~gld!
a3g)l!
- [p d j
[(
j N,,.[ y pl oJ
! j D l
1 L kj il I' f
! !'l j@K 1 W jjij;
. i, d A
hjell'..pl.
, 4l,[ J: tl$
j
. e.
u j ),'
k,;l, 4
i p
'IO III I
d
- f.1,,.
k E' ' ?- '
l O l l d l
WN h
s s ~gj.
W, v g@/v/kk et h
f Ib I
M :g..nY).... a...
- h..p..
ia.s w
=gg 1
w nj # ?' ?
"g
- ! #I{..l a g.;-~g;d n w. n// Q
%0j-r
< :. c ;
~
t F,l.rI!
b f,.'
AkD I
a w
1
.?j
.I p%L%
i li
[0
[
yl
,h LT a ?
g ls h A
(
d W...,8..'.
y~.1'r ; W.2 1t, -
- - =
(
'3 I
' h.',
-g
,,, g..
Figure 2
.GlM1!1tE09tf prawino Number 81151/4. Sh. 2 P7 c%
k{
A t:t :
-w---
g g
11--
g j q,, di h I! N d
( h I
n f u;f ws 8.
n u,
n gw.y t p A:,
gg 3 d3 S.q}. JQT u.a j r s\\y; ;[$w}
a e
gt ;
~
g
.i t ip e
in gh l it 6
t l kr A (sl$*jf9i
~
f
- jT[T [hk WA
'Q{ S i
y, wm
' as q& "V'
- a..
l c.
l l=
'rW~ f N55
&gIli jh bmv[
D y~
t e i
Lq g
.j{
v r !
.[.
n,; s m
e o
- rW
.ur tz f N k
?
CZh my pygt
%,f$
2_ M
$ ').l4,w" b +: d
- n t
a 3
m s
d
' t J[i d 4'
j
=
yya g
p' xe ft,B%.. p ; dth' y"*nf ih d 4
$a,e
'ss, 7 :s kb,e,)s d N
< apu g ------
m
+% i (W.4 Ws; i
,~
'**+M-h4a-+4+-
4 5
- s--J-.%
- ~ * -
J--*
A-J-h*
h"4EAJA
--h--h.-4h-*awA4a.'=
'* Awe-jaw-a--4-4-.
4 a
2 iw
---iA o-
+4
-e4e-Eh A-w
+-
FCure3 E
[ d 7*
T
\\
.L:
,Y i
(%
.'s.
g.
/
\\
S.
u
--w -
~
-F.
,J
}
~
e*
's, k
4 9!
S en g
til.
1.
/
i sA-jII
'e"
- f v:
- ; ;,g f u. h.,
re
\\.
xxx.
o s
e f
s E
N
\\
s l
,e s.
.L(
- s
?w ?
y 2
3 7-g g
/
"g
'8
. t'.
k'. 10.,
8, 2 *. :;
a 3.3 g
si N
E E E..
% (\\)e. \\
-\\\\
r.
I w....
.\\.
......1...
w s..
.:..;s!::::
, v,,:
j.gi:::
.32.tal ::
u_..
w
-,v.----m--
6 A
m
-,4-w
.&--_a
-A+4ee4 4-es hw&gA5-*#
hie he4+44M-Mh-*M+A=mLi*MMp3*-* eda M W Ah+M 44A' W h M-W' W 8NA-4 A'*A-M M 8 hM M A'J44 h A-94-&,
&4mA..
Figure 4
?
bI
/
\\.
/
6 2
\\
g 1 's
\\
' /,
t s
4 6
g
~
.g %
a
\\
\\1
~
.\\
's 1
.g 1.l.l.:
t s
"\\5!.!.!;
li i
\\,
_khh'I u
i t
s I
i
\\
-1 6
s 4
\\
'5
's g
i s.
il
\\ "*
4, si.( 'a i,llig 5:
a
\\
3 8.
53
\\
\\
- 1...
\\
\\,'
lagt v..ll g:
w
~
y-1
(-
l l
1
PBNP Unit 1 HP.RR-101 SpInconent/Atta Piping between vanes tSl441 A, IS1442A and 1Sl439A Piping betwoon vaNos 181641B,1Sl442B and 1S1-8390 Piping between vanes 1Sl478A and 1S1445D Piping between vanes 1614700 and 1814450 Piping betwoon vanes 1SI-870B and 1Sl445B Salegory and Itom flgmhet C-H C7.21 DJA9 IRID 110E017, Sh.1 RtquiremeDUTJHH.WhlCllRREfDLB291Lttltd IWC-5222(a) requires a test pressure at least 1.25 times the system design pressure for systems with a dcsign temperature above 200*F.
Assis for Relief The portions of ISI Class 2 piping from which relief is being requested cannot be Iselated from the ISI Cless 1 reactor coolant system due to the check vane configurations. The adjacent reactor coolant system hydrostatic test is perforrned at 2350 psig. The piping from which relief is being requested is line class 2501R which has a design pressure of 2500 psig and would require n test pressure of 3225 psig.
Therefore, to test these portions in accordance with the Code could result in over pressurlzation of the reactor coolant system and boren would be injected into the rssc*or coolant systent Attttnale_Exelninallen Perform the required VT 2 examination based on the lower design pressure of the piping that is upstream of these portions, which would teguire the piping to be tested at a pressure of 2190 psig. This test is to be conducted coincident with the reactor coolant system hydrostatlc test to prevent the accidental injection of boron into the reactor coolant system.
I G
m-__
Comoo tent / Area Piping between valves 1SI 845A arxi 1SI 878D Piping between valves ISI 045E and 1SI 678E P'ptng between vetves 1SI-845F and ISI 878F SalfaQuL10d.jlfttn.Hutnttet 0 H + C7.21 EktlLrem 110E017,Sh.1 Reauirement fromJyhich Rollef_ls.Megutalad IWC-5222(a) reo tires a test pressure at least 1.25 times the system design pressure for systems with a design temperature above 2007.
18_tlt.19L!1tilti The portbns of ISI Class 2 piping from which ralW is being requested cannot be isolated from the ISI
. Class 1 reactor coolant system due to the eneck valve configurations. The adjacent reactor coolant system hydrostatb test is performed at 2350 psig. Tt'e piping tror.1 which tellef is being requested is lino class 250tR which has a desigit pressure of 2590 psig, and would require a test plassure of 3225 psig.
Therefore, to test thout portioris in accordance with the Code codd result in over pressurization of the reactor coolant system and bercn would be injected intn ttw reactor coolant system.
ARemnit.Examinatino Perform the required VT 2 examination based on the 181 Class 1 reactor coolant system hydrostat!c tact requirements. The pressure test will be conducted coinckient with the reactor coolant system hydrostatic pressure test. This req'
- the piping to be tested at a pressure of 2350 psig.
s-P-
4
l l
l l
.CV1D9911tDLIAt.ta Auxulary Foodwater Pump 1P 29 and discharge piping to valves AF 100 arvj AF4002 AuxBlary Feedwater Pump 1P 38A and discharge piping to valves AF 109 and AF4007
.C319291Y_gDg item Number D B D2,10 Ei!LrAID M 217 Etquirement from whh.h Rfilef is Reauesled IWD 5223(a) requires a test prensure at least 1,10 times the system design pressure for systems with a design temperature of 200*F or loss.
Basis for Hellt!
The portions of ISI Class 3 pipinD deso,ibed above cannot be isolated from the suction side of the aux'llary foodwater pumps. Physical limitations of contrifugal pumps require the discharge piping to be tested with the suction side of the pumps. The design pressure for the suction side of these pumps is 50 psig, resulting in a required test pressute of 55 psig. However, the discharge piping has a design pressure of 1440 psig, which would require a to t pressure of 1584 psig. The maximi m test pressure for the discharge piping is achieved by operation of the pumps,1325 psig for pump 1P 29 and 1420 psig ior pump 1P 38A.
Altrnait Examinellon A VT 2 visual examination will t>e performed during system fundional testing in lieu of a system hydrostatic test.
PSNP Unit 1 HP-RR 1-04 Component / Area Containment Spray Pump 1P 14A and discharge piping to valves 1SI 882A, ISl459A and containment spray eductor 12 275A Containment Spray Pump 1P 14B and discharge piping to valves 1SI 002B,1SI 850B and containment spray eductor 12 275B
,Qalgory and item Number C H C7.21
.Djaaram 110E017.Sh.3
.Einttittmt01.ftom.which Rollef la RML!1tlid IWC 5222(a) requires a iost pressure at least 1.25 times the system design pressure for systems with a destcn temperature above 200*F.
B6ste for Alltj The portions of ISI Ossa 2 piping described above cannot be isolated from the suction side of the containment spray pumps. Physical limitations of centrifugal pumps require the discharge piping to be tested wl:5 the suction side of the pumps. The design pressure for the suction side of these pumps is 150 psig, resutting In a required test pressure of 180 psig. However, the discharge piping has a design pressure of 370 pntg, which would require a test pressure of 403 psig. The maximum test pressure for the discharge piping is achieved by simultaneously operating thJ RHR pumps and the containment spray pumps in tieries to provide additional containment spray pump suction pressure at the spray pump dischar00. This process, referred to as ' piggy back' mode, produces a discharge piping test pressure on 400 psig and is performed during the in4 trvice Test, ' Leakage Reduction and Preventive Maintenance Program of the Containm(nt Spray System,'IT 540A.
AllttilatfLEIAml0729B A VT 2 visual ext.mination of this piping witi be conducted during the annual perforrm nce of IT 540A in llou of a system hydrostatic test.
l PBNP Unh 1 HP RR 1-05 M9H190ntDil.Af.tt Service Water System main supply header piping Stianory and item _Numhtt D B D2.10 Dlt2flD)
M 207. Sh.1 M 207, Sh. 2 M 207, Sh. 3 M 207, Sh. 4 M 2207, Sh.1 M 2207, Sh. 2 Etguirement from whleh HelJgf is Hooyttigd lWD 5223(a) requires a test pressure at Imst 1.10 times the system design pressure for systems whh a design temperature of 200*F or less.
J.P.Ls for Relief i
The service water system supp!!es cooling water to bot'i units at PBNP. Normal system operating pressure is 75 psig. The design pressure for this system is 100 psig, resulting in a regulred test pressure of 110 psig. PBNP plant technical spe;lficstions 15.3.3.D 1 and 1o.3.3.D 2 prevent configuring the service water system to permit hydrostatic testrva in accordance with the Code. Therefore, the portions of ISI Cissa 3 piping described above cannot be isolated for the purpose of hydrostatic testing without placing the plant in a LCO as well as intrcducing the risk of a pani technical specification violatlen.
Alternate FMRllDell23 A VT 2 visual examlnation will be performed during a 'modifiud" system inservice test in lieu of a system hydrostatic test. However, all six pumps will be operated to attain the maximum allown'e pressure without exceeding 100 psig. If 100 psig is exceeded, the relief valves in the system will lift, Rdlef valves will not be gagged for this test.
l
l P:NP Unit 1 HP-RR 106 SSmD2nt0Matf4 Piping between valves 1SIEGA ard 1BIM4A Piping betwessn valvon 1SIE0B and 181448 Piping between vatyrs 1S1470A ard 1Sl@8A Piping between valves 181470B and 181458B Piping between valves 1$1494 ard 181495
.Clit9011RDdlieELEllDikki C-H C7.21 f]p9f.Am 110E017 Sh.2 110E017, Sh. 3 Benuktmin!.ft91n which Relief is Reauttled IWC-5222(a) requires a tes' p essure at least 1.25 times the system design pressure for systems with a design temperature above 2W'F.
Basis for Ralltj Th0 portlons of ISI Class 2 piping described above cannot be isolated from the RWST due to check vata tAnfigurations. These portions must be testod coincident with the PWST.
AlltEDate Examinelign A VT 2 visual examination of these portions will be periormed at the static hoao pressure of the RWST when filled to design capacity in accordance with IWC 5522(b).
PBNP Unit 1 HP-HR.1-07 DDMVDDtdLNta Safety in ection Pump IP 15A ard dischargo piping to valvos 1Sl 689A and the mini-tectre ortice Safety in ection Pump tP.158 afd dischargo piping to valvos 1S1089B and the mlnl-rectre orifice Enle7try.utLttem Pumbec C-H C7.21 DlGram 110E017, Sh. 2 Biqultimin] from which Rfilef is Reautned lWC 5222(a) requires a lost pressure at least 1.25 times *.he system design pressure for systems with a design temperature above 200*F.
Datje for_Rejltj The portions of ISI Class 2 piping described above cannot bo isolated from the suction sido of the safety injection pumps. Physical limitations of centrifugal pumps require the discharge piping to be testod with the suction skle of the pumps. The design pressure for the suction sue of those pumps is 150 psig, resulting in a required test pressure of 18e psig. Howevor, the dischargo piping has a design pressure of 1745 psig, per MOD Request 172, which would require a test pressure of 2182 psig. The maximum test pressure is achieved by almuttaneously operating the RHR pumps and the safety injection pumps in series to provde addalonal saloty injection pump suction pressure at the safety injection pump l
dischargo. This process, referred to as ' piggy back' mode, produces a test pressure of 1700 psig and is I
performod during the Inservice Test, 'Loakago Roduction ard Preventive Maintenance Program of the 1
Safoty injection System,' IT 520A.
/SRIDete Examina_tig!
A VT 2 vloual examination wl!! be performod during system functional testing 10 *plggy-back' mode with the RHR pumps during the unnual performance of IT 520A in lieu of a system hydrostatic test.
l e.m----.
.. -_..~.
PBNP Unit 1 j
HP HR 108 Component / Area Safety injection Pump 1P 15A mini rocirc ard test lines Safety injoction Pump 1P 15B minl-rectro and test lines Cateoory and ftem NumbtC C H C7.21
.QJa2 IRID 110E017, Sh. 2 Stgulrement fromyld1l.ch,Bellillt.RI sut31td IWC-5222(a) regulres a test pressut; et ;1ast 1.25 times the system design pressuro for systems with a design temperaturo above 200*F.
Agsls for Reflef The portions of ISI Class 2 piping descrited above contain components that cannot be isolated. The design pressure for this piping is 1745 psig, resulting in a required test pressure of 2181 psig. However, the maximum test pressure for this portion of the system is limitod based on the ' maximum working pressure' of those components,1500 psig. The components e,re 1F1029 and 1FI-933.
Afternate Examlutil011 A VT 2 visual examination will be perfom10d at the ' maximum working pressuro" for the limiting components that are not isolable,1500 psig.
PBNP UnH 1 HP-RR.1-09
.C222onent/Ates Emergoney diesel generator air relay vafves DA-3057A 0,7f DA-30578 Emergency diesel generator air relay valves DA 3058A aid DA-3058B
.Relegorv arxl ftem_ _ Number D B D2.10
.DJtSttID M 219 Sh.12 Regylrement from which Rtlk(,lt Eggyttled IWD 5223(a) requires a test p.essuit at least 1.10 times the system design possure for systems with a design temperature of 200*F or less.
Anals for Rollef information supplied by the valve manu'acturor Irdbates that the air relay valves described above cannot tx< pressurized beyond their design pressure of 200 psig without causing damage to the valve.
The diesel air start system is normally at 200 p$) wkh relief valves net at 220 psig.
Attornate Examination A VT 2 visual examination will be performed during systern functional testing in llou of a system hydrostatic test. The test will be performed at normal;l:dem pressure of 200 psig to provent damage to the valves.
l
.Cenwontnilk n Piping between vatve ICC-758A and the reactor coolant pump flange Piping betwesa valvo 100 7500 arxf the reactor coolant pump flenge
,Cpjspryptgf Hem Numhet D-B D2,10 DlMIT9Bl 110E018,Sh.2 BMtlktmtDLtrom whleh Rejiq[.ja.Hegutgitd IWD-5223(a) requires a test pressuro e least 1.25 times tre system design pressure for systems whh n design tempora;t.re abwe than 200'F.
Dalla _f0f.Eff21 The portions of ISI Class O piping from which relief is being requested rhould have a test pressure based on the safety waNu setpoint of valves 1CC 762A and 100 762B,2500 psig. These portions have boon designed to a high internsi pressure (equivalent in the primary system pressure) to meet conditions that could exist in the event of a heat excha eger leak inside of the pump. The maximum component cooling wat6r ptessure inside the thermal blurier urder normal operating conditions should not exceed 150 psig.
As stated in the technical neanual 6Lt the reactor coolant pumps, the manufacturer of the pumps states that the maxtraum allowable thermal barrlor htat exchanger intomal field hydrostatic test pressure is 225 psig. Becaurie of th!s, hydrostatic testing of componento in the attaclat component cooling water system to higher pressures should only be performed with the heat exchseger isolated or disconnected and bypassed. However, insufficient clearance exists at the flanged connections rear valves ICC-758A and 100 758B to connect a hydrostatic test rig. Tharefore, these portions must to testod coincident with the pressure test that is performed whh the adjacent piping system.
Afternate Examinallon The hydrostatic test wRl be performed at the same pressure as tno adjacent componant cooling water piping system, 200 psig.
l
-.,. -