ML20203B689
| ML20203B689 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 12/11/1997 |
| From: | Schopfer D SARGENT & LUNDY, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 9583-100, NUDOCS 9712150128 | |
| Download: ML20203B689 (48) | |
Text
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- Sargerit%Lundy "c V4 7
Don K.Schopfer
- Vee Presldent 312 269 6078 December 11 1997 Project No. 9583-100 Docket No. 50-423
- Northeast Nuclear Energy Company Millstone Nuclear Power Station, Unit No. 3 Independent Corrective Action Verification Program United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555 I have enclosed the following nineteen (19) discrepancy reports (DRs) identified during our review activities for the ICAVP. These DRs are being distributed in accordance with the Communications Protocol, PI MP3-01.
DR No. DR-MP3-0224 DR No. DR-MP3-0695 DR No. DR-MP3-0225 DR No. DR-MP3-0700 DR No. DR-MP3-0326 DRNo. DR-MP3 0703 DR No. DR-MP3-0318 DR No. DR-MP3-0707 DR No. DR-MP3-0413 DR No. DR-MP3-0713 DR No. DR-MP3-0416 DR No. DR MP3-0715 DR No. DR-MP3-0474 DR No. DR-MP3-0720 DR No. DR-MP3-0670 DR No. DR-MP3-0721 DR No. DR.MP3 0679 DR No. DR-MP3-0722 DR No. DR-MP3-0724
- I have also enclosed the following one (1) DR that has been determined inv:;. lid. No action -
is required from Northeast Utilities for this DR. The basis for its invalid determination is included on the document.
DR No. DR-MP3-0599-9712150128 971211 L
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II.Ull.tQl"tllll1"Ill.yy 1v,qtp VV#d 55 East Lionroe Street
- Chicago. IL 60603-5780 USA
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United States Nuclear Regulatory Commission Exember 11,.1997 Document Control Desk Project No. 9583-100 Page 2 I have also enclosed the following two (2) DRs for which the NU resolutions have been reviewed and accepted by S&L.
DR No. DR-MP3-0037 i
DR No. DR-MP3-0042 I have also enclosed the four (4) DRs for which the NU resolutions have been reviewed but not accepted. S&L comments on these resolutions have been provided.
DR No. DR-MP3-0021 DR No. DR-MP3-0047 DR No. DR-MP3-0052 DR No. DR-MP3-0076 Please direct any questions to me at (312) 269 6078.
Yours very truly, b.T A.
1l -
D. K. Schopfer Vice President and ICAVP Manager DKS:spr Enclosures Copies:
E. Imbre(1/l) Deputy Director, ICAVP Oversight T. Concannon (1/l) Nuclear Energy Advisory Council J. Fougere (1/l) NU miavpwrs7svi2Il aone
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1-Northeast Utilities ICAVP DR N2. DR-MP3 0224 Millstone Unit 3 Discrepancy Report i
Review Group: Contguration DR VALIO Potential OperetnWy issue Discipl6pe: I & C Desgn O y=
Discrepency Type: Instenation implementation
% No SysterWProcess: RSS
~
NRC Sign 6ficance level: 4 Date faxed to NU:
Date Published: 12/1497 Discrepancy: Installation not in accordance with drawings.
Descriptio : The following difference between the installation and the requirements of the installation drawings were noted during system walkdowns.
Drawing 12179-BK-16P 70 Sheet 1 of 1. Rev. 3 shows proper instrument installation including level mounting. Horizontally mounted 3RSS-PT43B is not mounted in a level position. This could impact the accuracy and performance of the instrument.
Rev6ew Valid invalid Needed Date Instletor: Sarwr, T. L O
O O
11/25 S 7 VT Lead: Nert, Anthony A O
O O
11/29,97 0
0 12/ss7 VT Mgr: Sch@fer, Don K IRC Chmn: Sin 0h. Anand K 0
2/ss7 Date:
INVALID:
Date:
RESOLUTION:
Previously identified by 14U? O ve.
i*1 No Non Discrepent Condition?Q ves
'*) No Resolution Pendmg?O veo + No Resolution Unresolved?O ve.
+ No Review Acceptable Not Acceptable Needed Date inh Sm T. L VT Lead: Nort, Anthony A VT Mgr: Schopfw, Don K 1RC Chmn: Singh, Anand K Date:
SL Comments:
Printed 12/11/97 9 26.22 AM Page 1 of 1
Northeast Utilities ICAVP DR Nr. DR-MP3 0225 Millstone Unit 3 Discrepancy Report Review Group: Conrguraton t>R VAUD Review Element: Systern Instanaten p
Diecipline: I & C Desgn Ow Discrepancy Type: Installaten implernentaten SystenvProcess: SWP NRC FigniAcance leved: 4 Date faxed to NU:
Date Published: 12/14s7 Discrepancy: Labeling not in accordance with requirements Decription: The followina labeling inadequacies with respect to design documents aW requirements of Procedure OA-9, ReV,2,
" System and Component Labeling," were noted during system walkdowns.
Kaman vendor drawir>g 2474.030-624-193 Rev. F designates the following identitles for components included in panels 3RMS*RAK1 A and 3RMS*RAK1B:
Recorder (REC 7) to be identified as 3SWP*RR60A Recorder (REC 7 & 8) to be identified 3S) 760B Contrary to these requirements, these recorders are currently labeled as RIC 7A and RIC 7B & 88, Review Valid Invalid Needed Date initiator: Server, T. L 0
0 0
ti2ss7 VT Leed: Neri, Anthony A O
O O
$ ' SS7 VT Mgr: Schopfer, Don K O
O O
25S7 1RC Chmn: Sin 0h, Anand K O
O O
i2/as7 Date:
INVALID:
Dale:
RESOLUTION:
'~ 'reviously identined by NU? O Yes tSt No Non Discrepant Condetion?O Yes
( # > No Resolution Pending?O ve.
<*i No Resolution Unresolved?O vos
- )
No Rev6ew initiator: Sarver, T. L VT Lead: Nort, Anthony A VT Mgr: Schopfer, Don K IRC Chmn: Smgh, Anand K Date:
SL Comments:
Prtnted 12/11,s7 9.27.27 AM Page 1 of 1
DR No. DR-MP3-0226 Northe:st Utilities ICAVP Millstone Unk 3 Discrepancy Report DR VAUD Rev6ew Groop: Conrigureten Potential OperebWty issue Discipline: I & C DeWg" Om Diecripancy Type: Installaten implementaten SystenWProcess: sWP NRC Sign 4Acance level: 4 Date iued to NU:
Date FAlished: 12/1497 D'*Cf*Pency: Instrument Mounting
==
Description:==
Instrumentation mounting details are provided in Vendor manuals and design drawings. The following discrepancies between design documents and the installatir,n were noted during the system walkdown.
- 1. Rosemount Vendor Manual 658-0028 require that instruments will be mounted level. Flow transmitter 3SWP-FT-59C is not installed level. Excessively out of level conditions may impact the accuracy of the flow transmitter causing mal-functions given the small pressure involved - this device measures differential pressures in the range of inches of water.
The difforence in the elevation of the ports of this device resulting from the out-of level condition could affect the ability of the instrument to accurately measure the pressure differential and, therefore, the flow in the pipe.
- 2. Helicoid /Ashcroft Vendor Manual 01M-226-002A requires that flush or wall-mounted gauges are to be installed by means of screws. Pressure indicators 3SWP Pl139A&B,140 A&B,141 A&B and 142 A&B are all mounted with only one of the three required mounting bolts / screws.
- 3. Mounting and corrosion / oxidation control requirements are set forth in Barton Manuals 01M-377 5A,01M-377.0018,01M.
377.008A and Nu specifications SP-EE 212-D-3 (2.23 2.25)
NETM 22 (1,27 & 2.28). Improper instrument mounting and lack of corrosion / oxidation control can lead to premature device failure.
Differential pressure transmitters mounting screws & star washers on 3SWP*PDIS 24A, B, C, D, and pressure transmitters 3SWP PDIS 110A, B, C, D located in intake structure / pump house show significant signs of oxidation / corrosion. These instruments are exposed to a salt air atmosphere. The mounting screws, nuts and washers also may no longer meet seismic mounting and ASTM qualifications.
- Instrument 3SWP PDIS 1100 mounting screw does not have a star washer under screw head and no longer meets vendor mounting instructions.
Review Vai6d Wal6d Needed Date inetlator: Sarver, T. L O
O O
128 S7 VT Lead: Nort. Anthony A O
O O
11/2S/97 VT Mgt: Schopfe, Don K O
O O
$2/st97 IRC Chmn: Singh, Anand K O
O O
12 @ 97
' Printed 12/11/97 9 29 41 AM Page 1 of 2
Northeast Utilitle:
ICAVP DR ND. DR MP3-0226 Millstone Unit 3 Discrepancy Report D.i.:
DNALID:
Date:
RESOLUTION:
Prev 6ously identmed by NU? V Yes
'97 No Non Discrepant Condst6on?V Yes
' @l No Resolution Pending?O vee ti) No Resolut6on Unresolved?O vee :#) No Review inMietor: Sarwr, T. L.
VT Lead: Nort, Anthony A VT Mgr: Schopfer. Don K IHC Chmn: Sangh, Anand K O
O Date:
SL Commentt:
i 1
6 m
d Pnnted 12/11/97 929 46 AM Page 2 of 2 l
Northeast Utilities ICAVP DR No. DR MP3 0314 Millstone Unit 3 Discrepancy Report Review Group: System DRVAUD Review Element: System Design g
Discipline: Electreal Design Ow Discrepancy Type: Calculebon 4g SysterrVProcess: DGX
~
NRC significance level: 3 p.g pax d to 99:
Date Pubhshed: 12/1497 Discrepency: Short Circuit Current et 4160 volt Buses 34A and 34C D*ecript6on: Calculation NL-051, Revision 3 CCN No. 2 determines the short circuit current at the 6900,4160, and 480 voit swithchgear. The short circuit current is relatively high compared to the circuit breaker ratings at 4160 volt buses 34A and 34C when the emergency diesel generator is undergoing routine testing. In order to demonstrate that the switchgear at these two buses is operated within their ratings, additional calculation steps are performed to refine the output of the PSS/U (OPAL) computer program that is used to perform short circuit calculations.
Attachment IV calculates the momentary (closc and latch) current for the Nodes 34A and 34C (3NNS-SWG-A and 3 ENS *SWG-A) in a manner that is less conservative than allowed by the ANSI standards that define the rating and application of medium voltage circuit breakers. In the ANSI standards the momentary current is calculated as 1.6 times the E/X current. Attachment IV replaces this multiplier with a lower multiplier representing the ratio of the rms total current at 1/2 cycle divided by the symmetrical current. Whr 3 this adjustment is allowed by some other standards bodies, the multiplier of 1.6 is used in the ANSI standards no matter how low the X/R ratio at the fault, as shown in the example on pages 40 and 41 of ANSI /
IEEE Standard C37.010-1979. Section 4.5.4.1 of IEEE Standard 141-1993 (" Red Book") also shows the use of a fixed multiplier to account for assymetry. If supporting documentation is available to support the calculation methodology, it should be included as an attachment to the calculation.
Attachment IV recalculates the motor contribution at Node 34A based on the actual motor short circuit time constants. The salues of the subtransient (locked rotor) current for each motor is taken directly from the PSS/U output for the momentary current.
ANSI C37.010-1979 states that the momentary contribution for 2 pole motors rated 250 hp or less and all other motors rated 1000 hp or less is the subtransient current divided by 1.2. If PSS/U calculates the motor contribution in accordance with the ANSI sinndards, the decay in the motor contribution was accounted for twice in the calculation, once from the standard reactance multiplier and oncety the application of the time constant. The hand calculation of the motor contribution did not remove the effect of this standard dectoment factor before applying the decrement factor calculated from the short circuit time constant.
Because of using two decrement factors, the decay in the motor short circuit contribution would be overstated, and the contribution of the motors to the fault current would be greater th00 0! t^ M 'he 00!Ou!0t!00 40 0v0.~, On '":0fn0t!00 jfg,, 3
%, gym
Northeast Utilities ICAVP DR N3 DR-MP3 0318 Millstone Unit 3 Discrepancy Report ratio of the motor momentary and interrupting short circuit calculations suggests that PSS/U may be treating all motors as large motors. Since the motor contribution is significant in a power plant auxiliary sytstem, the method of calculating the motor contribution in PSS/U needs to be documented, especially where it differs from ANSI C37.010.
As stated in the calculation, Attachment IV applied the AC decrement factor to the impedance of the motor plus that of the feeder cable to evaluate the motor contribution at Bus 34A. The decrement factor only applies to the motor impedance. This approximation understates the motor contribution. As pointed out in the calculation text, this is compensated for by using the standard multipliers given in ANSI C37.010 for the motors on Node 340. These standard multipliers generally overstate the motor contribution, and Nodes 34A and 34C are electrically close to each other, in this case where the calculation shows little margin in the short circuit current, a morre rigorous approach should be taken.
The calculation assumes that both diesel generators are tested simultaneously, while the operating procedures only allows one diesel generator to be tested at a time. This was done to simplify the preparation of the calculation. The presence of the extra diesel generator is conservative, since it will contribute to the short circuit current. However, the relatively high impedance between the two 4160 volt NSST and RSST windings will limit this additional contribution. The amount of conservatism introduced by this simplification is not known.
Based on the above comments, there is little short circuit margin at Buses 34A and 34C. While we realize that the circuit breakers are tested to currents that are slightly higher than those given in the stsndards, the calculation documentation should be refined and the calculation bases documented to support the calculation's conclusions.
The calculation assumed that the bus ties of all double ended unit substations were open. However, operation with t?,e tie closed can increase the motor contribution to the short circuit and may result in the circuit breaker rating being exceeded in some cases. This may represent a more severe case. Operation with the bus tie closed should be addressed.
in addition, the calculation does not address loading conditions that may result in higher short circuit currents than 1 1e normal operation case used in the calculation. For exampk raswming u,
that the emergency diesel generator is not in operation, the t' ort citenit current during the injection phase of a LOCA may be higher at the Class 1E buses since the motor contribution from the Class 1E motors is higher while there is no reduction m the contribution from the non-Class 1E loads. Either a number of loading conditions should be considered or the calculation should demonstrate tr.at the loadino conditions studied are the Printed 12/11/97 9 32.09 AM Page 2 of 3
i Northeast Utilities ICAVP DR No. DR-MP34318 Millstone Unit 3 Discrepancy Report most severe case.
There are also a few numerical errors in the calculation. Thase arithmetic errors do not affect the conclusion of the calculation, but should be corrected.
On page 3 of Attachment 1 for Node 322AL, the fault current after adjustment for the prefault voltage is 79% of the circuit breaker rating, not 86% as shown; at Node 323AL the fault current after adjustment for the prefault voltage is 67% of the circui Yeaker rating, not 68% as shown.
On page 2 of Attachment II, the interrupting current is 95% of the r
circuit breaker rating for Nodes 34A and 34C, not the value of 89% shown.
On page 3 of Attachment 2, the fault current at Node 32A is 86%
of the circuit breaker rating, not 87% as shown. Tthe fault current at Node 322AL is 80% of the circuit breaker rating, not 81% as
- shown, Rev6ew Valid invaki Needed Date inAlatof: Bloethe, G. Wilhem O
O O
11rcS7 VT Lead: Nort, Anthony A O
O O
i r2as7 VT Mgr: Schopfer, Don K O
O O
12597 IRC Chmn: SNh, Anand K O
O O
i2SS7 Date:
INVALID:
Date:
RESOLUTION:
Previously identined by NU7 O Yes 9' No Non Discrepant Conditi<mn) Yes Gi No Resolution Pendmg70 Yes
- 9) No ResolutionUnresolved70 vos
- )
No Rev6ew
- Y' initiator: (none)
O O
O VT Lead: Nort, Anthony A O
O VT Mgr: Schopfer, Don K IRC Chmn: Singh, Anand K Date:
sL Comments:
Pnnted 12/11/97 9 32.12 AM Page 3 of 3 I
l
}
Northeast Utilities ICAVP DR No. DR-MP3-0413 Millstone Unit 3 Discrepancy Report Review Group: System DR VALID Potential Operabiedy issue Discipl6ne: Emronmnents Quahfcaten Om D6screpancy Type: Component Dats 7
SystenWProcess: SWP NRC Significance level: 4 Date faxed to NU:
Date Published: 12/1497 D6screpancy: Environmental Zone Discrepancy in Specification No. 2362.200-164 Descripuon: The Proculement Specification No. 2362.200-164 for Motor Operated Valves lists the environmental (EQ) Zone for the motor operators 3SWP*MOV71 A,B as Zone AB-07 (Page 14 of 26, Amendment 1). However, from the Millstone databases PDDS, EQ Master Ust, and the d*awings Nos. 25212-21001 shi, and 25212 21004-shi, the locetion for motor operators 3SWP*MOV71 A,B is EQ Zone AB-09. This is a discrepant condition.
The review of both EQ Zones show that the environmental conditions are the same for AB-07 and AB-09 only during normal conditions only. During accident conditions, the maximum temperature in Zone AB-09 reaches 210 F and stays constant from 10 sec. to 2500 sec. after the accident.
The EQ conditions in Zone AB-07 is less harsh than AB-09. The expected maximum temperature in this EQ Zone AB-07 will not exceed 200 F, from 20 sec. to 30 sec. after the accident.
The review of the Limitorque motor operator Test Report No.
B0058, Rev. O, dated 1/11/1980 for 3SWP*MOV71 A,B shows that the equipment is capable of maintaining its environmental qu1lification in both Zones AB-09 or AB-07.
The inconsistency between the procurement specification ar:d she PDDS, EQ Master List and Drawings appears to be a documentation discrepancy.
Review Valid invalid Needed Date initiator: Yassn.s.
Q Q
Q 11/28,97 VT Lead: hert, Anthony A g
]
]
11/2k97 VT Mgr: schopter, Don K Q
O O
12/s.s7 IRC Chmn: singh. Anand K O
O O
$2/SS7 Date:
INVALID:
Date:
RESOLUTION:
Previously Identifled by NU7 (D Yes @ No Non Discrepant CondmonK) Yes @ No Resolution Pendmg?O Ye.
@ No Resolution Unresolved?O Ye.
+ No Review
~
Acceptable Not Acceptable Needed Date In h M VT Lead: Nort, Anthony A VT Mgt: schopfer Don K IRC Chmn: sogn, Anand K Date:
Pnnted 12/11/97 9.33.00 AM Page 1 of 2
l Northeast UtilRiss ICAVP DR Ns. DR MP3 0413 Mhistone Unit 3 Discrepancy Report SL Comments:
i 1
I i
1 i
a 1
i 1
~
Pnnled 12/11/97 9.33 03 AM Page 2 of 2 l
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Northeast UtilHies ICAVP DR N3. DR MP3 0416 Millstone Unk 3 Diacrepancy Raport Revtow Group: system DR VAllo Potentiel Operoidity issue Diecip. e: EnAronmnental Quebreceton Om Discrepency Type: Corr $ctwit Date
- ,3 g SystenVProcess
- RSS rMC Slgenficance level: 4 Date faxed to NU:
Date Publis5ect 12/1497 D6*cr*P*acy: Environmental ParaEeters Discrepancy in Specification No.
228.050-676 Deecr6pilon: The Procurernent Specification for Safety Related Motor Operated Valves (MOVs) does not list the expeded environmental conditions or the response spectra as required by the FSAR.
The Millstone Procurement Specification No. 2282.050-676 does not list the expected environmental conditions associated with the procured safety related Class 1E motor operated valves (MOVs). FSAR Section 3.118.2.2 require that all Class 1E equipment specifications define at least the worst case envelope service conditions anticipated for Class 1E electrical equipment.
Also, the Required Response Spectra at the equipment locations are not provided in the specification per the requirements of FSAR Sections 3.10 and 3.118.1.1.
The review of the equipmeret qualification (EQ) Test Rslort (Limitorque Report No. B0058, Ref. No. RSS A.2 0003) confirmed that the motor operator *. are environmentally qualified to the bounding environmental and seismic parameters at the equipment locatiens.
The lack of the required information in the Procurement Specification appears to be a documentation discrepancy.
Review Valid invaled Needed Date init6efor: Yatsin. S.
Q Q
Q 11/2891 VT Lead: Nort, Arf.any A O
O O
i SS7 VT Mgr: Schorter, Don K O
O O
$25S7 tRC Chmn: singh, Anand K O
O O
$25S7 Date:
INVAli #:
Dele:
RESOLUTION:
Previously idenuned by NU7 O Yes E#I o N:e Liscrepent condulon?O Yes i No N
Resolution Pemling70 Yee el No ResolutionUnresolved?O Yee
'*) No Review Acceptable Not Acceptable Needed Date gngg g O
O b
VT Lead: Neri. Anthony A VT Mer: Schopfer. Don K IRC Chmn: Singh. Anand K
=
Date:
Printed 12/11/97 9 36 47 AM Page 1 of 2
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Northeast Utilities ICAVP DR No. DR MP3 0416 Miiistone unk 3 Discrepancy Report SL Comments:
9 i
5 1
e b
F 4
s f
Printed 12/11/97 9 30 51 AM Page 2 of 2
Northeast Utilnies ICAVP DR No, DR MP3 0474 Millstone unk 3 Discrepancy Report
~
Rev o,oup: sy*m DR vAuo Review Element: system Desgn g
Diecip66ne: Mechanical Desgn Om Dioctopency Type: Calculaton 4 g, syelemfrocese: Oss NRC Sientfkence level: 4 Date faxed to NU:
Date Published: 12/1497 D6*cropency: Basis for Stroke Time of QSS isolation Valves Desertpuon: Calculation NM 027 ALL (Rev. 2: CCNs 1-6) provides the stroke time requirements for all actke valves in the plant. It also includes the specified stroke times according to the manufacturers.
- 1. The QSS fill time calculation (US(B) 225) requires the stroke time of the containment isolation valves (30SS*MOV34A/B) as input Calculation NM-027 ALL is the basis for the stroke time of these valves. Calculation NM-027 ALL references Calculation US(B) 225 as the basis for the stroke time of the,e valves. This is a circular reference and no true basis for the stroke time of these valves is given.
The manufacturer's spt cified stroke time a: cording to the design specification is 30 seconds. Regulatory requirements (Reg Guide 1.141 and ANSI N271) recommend stroke times less than 60 seconds for containment isolation valves. Therefore, using 40 seconds for the stoke time seems reasonable.
- 2. CCN 5 determines the stroke time requirement for Valves 30SS'AOV27 & 28, These valves isolate the RWST from the non safety related RWST cooling / purification subsystem and the non safety related RSS pump test loop piping. The CCN ssumed a break downstream of Refueling Water Recircula00n Pumps to determine how much water will be lost. The head losses from the RWST to the break location are determined based on a friction factor, f. The loss coefficients for certain fittings are given as a K value. K is equivalent to f*L/D; where L is the pipe length and D is the pipe diameter. K was converted to UD using an f of 0.01. After totaling the UD values, the 4
head loss was calculated using a friction factor of 0.013. This underestimates the amount of water lost from the RWST (3400 gal to 3475 gal) by approximately 2.2% However, the percent of water determined to be lost from the RWST does not change.
The conclusions of the calculation are not affected.
Review ve46d invalid Needed Date initletor; Langet.D.
Q Q
Q 11/2597 VT Leed: Non, Anthony A O
O O
si/2497 VT Mgt: Schopter. Don K Q
[
Q 12597 IRC Chmn: Singh, Anand K O
O O
125S7 Det.:
INVAUD:
Date:
Frinted 12/11/97 9 37.43 AM Page 1 of 2
Northeast Gtilities ICAVP DR No. DR4AP34474 Millstone Unit 3 N'*crepancy Report twn RE SOLUTION:
Previously identdW by NU7 6Yos ei No Non D6.ctre vd Corm 6on?U Yes e' No Resolution Pend 6ng?O ve.
- > No Re.osuiion unre.oeveerO vos + No Review Acceptande Not Acceptatde Needed Date g
O O
O VT Lead: Nett, Anthony A O
O VT Mgr: Schopfer. Don K IRC Chmn: Segh Anand K
=
SL Conenents:
d Prtnted 12/11517 9.37.47 AM Page 2 of 2
Northeast Utinties ICAVP DR N3. DR MP3-0670 Millsto6,e UnN 3 Discrepancy Report Review Group: system DR VALID Review Element: Modircatert L*6gn p
g g
D6scipl6ne: Mechew Desgn Ow Descrepency Type: Calcuteten
,, g System / Process: HVX NRC Sigrecance level: 3 Dele faxed to NO:
Date Putsieshed: 12/1497 Ducrepency: CCP & CHS Area Ventitation System Winter Operation Deectenon: During review of the charging pump and component cooling water pump area ventilation system calculations discrepanclu regarding the minimurn temperatures in the rooms were identified.
References:
- 1. Calculation 3 92103191M3, Rev.1
- 2. Calculation 3 92103191M3, Rev.1, CCN 1001
- 3. Calculation 3 92103191M3, Rev.1, CCN 1002
- 4. Calcula' ion 3-92103-191M3, Rev.1, CCN 1003
- 5. Calculation 3 92103191M3. Rev.1. CCN 1004
- 6. Calculation 3 92,J3-191M3, Rev.1. CCN 5
- 7. PDCR MP3-92103, Rev.1
- 8. FSAR Appencilx 3B
- 9. FSAR Section 9.4.3.1
- 10. PDCR MP3-93-067
- 11. PAID EM 148815 Rackground:
The charging pump and component cooling water pump area ventilation system provides ventilation for the charging pump cubicles, component cooling heat exchanger ares, and the MCC
& rod control A/C booster pumps area as shown on P&lD EM-1488 15.
FSAR Section 9.4.3.1 states that the charging pump cubicle temperature is maintained above the solubility temperature limit of 59'F for a 4 percent boron concentration.
The minimum room temperature listed in FSAR Appendix 3B for the charging pump cubicles and component cooling pump area is 50'F. The minimum temperature listed for the MCC & rod control area NC booster pumps is 65'F.
During the winter months the ventilation system mixes outside air and retum air and supplies this air to the component cooling pump ares, and the MCC & rod control A/C booste* pumps area. Retum air is drawn from all three areas served by the system. The mininium outside air flow is set to maintain auxiliary building ventilation system filter exhaust fan (3HVR*FN6A/B) airflow above stall conditior'i. Eight safety related electric unit heaters (fnur per division) are located in the component cooling water pump area.
PDCR MP3-92103, Mechanical Technical Review ME 3, states that sa'ety re!ated equipment in these areas are operable at a k
Printed 12/11s7 9 39 to AM
Northeast Utilities ICAVP DR No. DR-MP3467C Millstone unk 3 Discrepancy Report boric acid system may be subject to precipitation at ternperatures below 59'F and 2) the charging pumps should not be started at ternperatures below 65'F, but once started may be operated at an ambient temperature of 30'F.
Discrepancies:
- 1) Calculation 3-92103191 M3. CCN 5 case 10 results show a 29.6'F minimum temperature in the component cooling pump area. This temperature is lower than the 32*F evaluated in Mechanical Technical Evaluation ME 3 of PDCR MP3 92103.
- 2) Calculation 3 92103191 M3 Rev.1 [ including CCNs 1 to 5) does not address the minimum temperature in the MCC & rod control A/C booster pumps area.
- 3) The minimum room temperatures shown itt calculation 3 92 103191 M3 Rev.1 [ including CCNs 1 to 5) are lower than the temperatures shown in FSAR Section 9.4.3.1 and Appendix 3B Review Valid inval6d Needed Date inst 6etor: Stout. M D.
O O
O t 2S7 VT Lead: Ned, Ah.hony A y
[
Q 11/1 &97 VT Mgt: Schopfer. Don K O
O O
15S7 IRC Chmn: Segh. Anand K g
Q Q
12,S 97 Date:
INVAllo:
Date:
REs0LUTION:
Prev 6ously t ventef6ed by NUF
(,') Yes
- 8 No Non D6screpent Condet6on?Q Yes Ee 8 No Resolution PendingtO vee
- > No ResoiuiionUnresoeved70 ves
+ No Review Acceptable Not Acceptable Needed Date VT Leed: Nen. Anthony A VT Mgr: Schopfer, Don K IRC Chnn: Singh, Anand K Date:
sL Cormwnts:
Printed 12/11/97 9 3914 AM Page 2 of 2
Northeast Utilities ICAVP DR N3 DR MP3 0479 wiistone Unit 3 Discrepancy Report Rev6ew Group: Operettna & Maintenance and Teetng DR VALlo Review Element: Opersteg Pree p
g Diecip66ne: Operatone
,, y Diecrepancy Type: O & M & T Procedwo O No SyelettvProcess: DGX NRC Significance level: 4 0.g p Axed to NU:
Dele Puh84shed: 12/1497 Descrepency: Surveillance procedure designates a load range that is 166 kW less than the TS requirement DeC6Pilon: Technical Specification 4.8.1.1.2.b states:
"At least once per 184 days, verify that the diesel generator starts and attains generator voltage and frequency of 41601420 2
and 60 *0.8 Hz within 11 seconds after the start signal. The generator shall be synchronized to the ar.3ociated emergency bus, loaded to greater than or equal to 4986 kW in accordance with the manufacturer's recommendations, and operate with a load greater than or equal to 4986 kW for at least 60 minutes...."
The " Technical Specification Gurveillance/ Testing fo.-
Requirement Cross Referent.e to actual Plant Procedure for all Tech. Specs." database identifies SP 3646A.1.
- Emergency Diesel Generator A Operability Test" as the controlling procedure that satisfies the requirements of TS 4.8.1.1.2.b. SP364GA.1 identifies OP Form 3646A.1 1, " Emergency Diesel Generator A Operability Tests" as the da'a sheet for establishing the T/S accept &nce critoria and dNumenting the test results.
Both SP3646A.1 and OP Form 36/6A.1 1 acceptance criterta for load is 4.800 to 5000 kW. and therefore designates a load range that is 186 kW less than the Technical Specification requirement.
Review Valid invol6d Needed Date f..diator: Tamfyn, Tom O
O O
" 'S7 VT Lead: Base. Ken O
Q Q
11/17/97 VT Mgt: Schopfer, Don K O
O O
12/1/97 IRC Ctwnn: Segh. Anand K O
O O
':/557 Date:
INVALID:
Dele:
RESOLUTION:
Previously identifled by NU7 O Yes t#1 No Non Descrepent Condst6on?O Yes 9' No Resolution Pending?O Yes
!#) No Resolut6on Unresolved?O Ye.
to) No Rev6ew Acceptable Not Accephble Needed we.d VT Lead: Base. Ken VT Mgt: Schopfer, Don K IRC Chmn: Segh, Anand K
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Pnnled 12/11/9r 9 41$6 AM Page 1 of 2 l
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Northeast Utilities ICAVP DR No. DR-MP3 0479 Millstone unit 3 Discrepancy Report i
b E1nied 12/1147 9 41:10 AM Pop 2 of 2
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i Northeast Utilities ICAVP DR No. DR MP3 0695 f
Millstone unit 3 Discrepancy Report Review Group: Sptern DR VAUD e
EW: Sptm N gn Potendal Operabi6dy issue Dioc6p66ne: Mechancel Deegn O Ya Discrepancy Type: Calculatson No SystemProcess: OSS NRC $6gruf6cance level: 4 Date faxed to NU:
Dale Putdished: 12/1497 0+>*Pency: RWST Insulation Desenpt6on: FSAR Sec. 6.2.2.2 tequires the maximum RWST heat up or cooldown rste be less than 0.25F/ day, Calculation P(R) 931, Rev. O assumes that the RWSTs are covered with 6 inches of thermal insulation in order to conclude that the maximum heat up and cooldown rates are 0.13F/ day.
There are no design documents which demonstrate that the RWSTs are covered with 6 inches of insulation.
Review Valid invahd Needed Date inttlator: Waketand. J. F.
O O
O iir22/s7 VT Lead: Neri. Anthony A O
O O
11/22,97 VT Mgr: Schopfer, Don K Q
Q 12/1/97 IRC Chmn: Singh, Anand K g
Q Q
12S 97 D.i.:
INVALID:
Date:
r.EsoLUTION:
Previously identihed by Nu? Q Yes
- 1 No NonD6screpentCondW6onrU Yes it) No Resolut6on Pend 6ng70 Yo.
+ No R.edui6on uar..aved70 Ye.
- > No Rev6ew initiator: (none)
VT Lead: Nort. Anthony A VT Mgr: Schopfer, Don K IRC Chmn: Singh, Anand K Date:
&L Conwnents:
Pnnted 12/11:07 9 4153 AM Page 1 of 1
DR No. DR MP3 0700 Northeast Utilities ICAVP I
Millstone Unit 3 Discrepancy Report Rom oraup: spem DR vAuo Review Eleme W: 6pem Des $n pm operabMy issue 06ecipl6ne: Electneal Des $n Q y,,
Dioctopency Type: Cocutocon el No SysterWPfocess: DOX NRC $6gn6Aconce level: 3 Date F Axed to NU:
Date Published: 1 !1 4'97 Siecrepency: Diesel Generator Wattmeter Accuracy (Calculation NL 41GE)
Description! Calculation NL 041GE calculates the uncertainty associtated with the diesel generator wattmeters that are located on the main control panel and the diesel generator local panels as well as the plant computer The range of instrument readings that could be indicated when the diesel generators are operated at important load limits are also calculated. We have the following comments on thit ca;culation:
The calculation considered the ratio error of the instrument transformers. However, the phase error was not considered.
Since the wattmeter needs to perform vectorial multiplication of the voltage and current, phase errors also contribute to the inaccuracy of the measurement. In effect, the phase errors represent an error in the measured power f actor (cosine of the angle between the voltage and current vectors) where the power is proportional to the magnitude of the voltage times the magnitude of the current times the power factor.
Section 4.14 of the calculation calculates the error due to the uncertainty of interpolating between minor diviolons when reading the analogue instruments (main control room wattmeter and diesel generator local panel wattmeter). The calculated error, taken to be % of a minor division is 1.15% for the wattmeters on the main control board and 1,25% for the wattmeter at the diesel generator local panel. The calculation then states " Calculated Readability error R using one-half of the minor division is greater than 1% of full scale, therefore,1% will be used". The calculation needs to justify reducing the calculated uncertainty.
The calculation states that temperature error is not applicable.
While it is true that the instruments are calibrated in a ' normal environment' in which the normal temperature is in the lower 20's Celsius, typical indoor areas at Millstone can experience temperatures of 50120*F (10-49'C), a range of nearly 40*C.
The temperature effect over such a temperature range can be significant. Unless specific steps are taken to eliminate temperature variations, any decision to neglect temperature variations needs to be based on a review of the temperature range in the area that the equipment is located in and information on how the accuracy of equipment such as transducers is affected by temperature variations.
The calculation considers the measuring and testing error of the instrument used to determine the transformation ratio of the voltage transformers that drive the wattmeters and watt tr=ce The4alie enor ef4heouneM-tc"Jc=em igdg p
,q
.- - - ~
Northeast UtilMies ICAVP DR Ne DR-MP3-0700 Millstone unN 3 Discrepancy Report the same instruments was also measured, and the measured error was used in the calculation. However, the measuring and testing error associated with the current transformer ratio measure was excluded from the calculations. The calculation shnuld justify not considering the measuring and testing error associated with the current transformer ratio measurements.
The ratios of the voltage and current transformers were measured under no-load conditions. The calculation includes an additional enor to account for the effect of the instrument transformer burden. The burden errors are treated as random errors. However, the error from the current transformer burden will take the fonn of increased excitation current (except for unusual burdens). This will atways act to reduce the output of the current transformer. The error due to the burden on it.e voltage transformer will take the form of 12 voltage drop, which will reduce the output of the voltage transformer for normal burdens.
The calculation should take the unidirectional behavior of the burden error into account.
Mott of the input data has a nominal tolerance in the order of 1
tenths of per cent. This implies four significant Ogures. However, some of ine test data and the calculations use fewer significant Ogures.
Rev6ow Valki invenid Needed Date inttletor: Bloeths. G. Wilhem O
O O
tir2as7 VT 1.ead: Nort, Anthcry A g
[
Q t1/2297 VT Mgt: Schopfer, Don K O
O O
25S7 IRC Chmn: Singh. Anand K g
Q Q
12/&97 Date:
INVAllo:
Date:
RESOLUTION:
Prev 60usty identified by Nti? - O Yes
'#l No don 06screpent Cond Hon 70 Yes
'91 No Resolution Pending70 Ye.
s) No Resolut60n Unresolved 70 Yo.
+ No Review Acceptab4e 14ot Acceptable Needed Date tw W V1 Lead: Nort. Anthony A VT Mgr: Schopfer. Don K (MC Chrews: Singh, Anand K SL Conwnents:
PrtnteJ 12/11/97 9 42 30 AM Page 2 of 2
Northeast Utilities ICAVP DR N3. DR MP3-0703 Milistone unit 3 Discrepancy Report Rev6ew orcup: System DR VALlO Review Element: System Desgn p
D6ecipiene: Mechancel Dewgn O Ya D6sciopency Type: Drawing SyseenvProcess: HVX NRC Significance level: 4 Date faxed to NU:
Date Putdished: 12/1497 D6ecrepency: Emergency Generator Enclosure Ventilation inlet Damper Minimum Position Desertpt6on: During review of P&lD EM 150016 for the emergency generator enclosure ventilation system a discrepancy rega: ding the minimum open positim for the inlet dampers was identified:
FSAR Section 9.4.6.5 states *When the emergency generator diesel engines have stopped (less than 360 rpm), the supply fans are stopped manually from the main heating and ventilation panel in the control room. The inlet damper gos to the minimum open position, the outlet and recirculating dampers 00 fully close and open, respect.. aly?
P&ID EM 150C 16 does not identify the minimum open position (minimum airflow) for inlet dampers 3HVP' MOD 23A/B Rev6ew VaHd invelM Needed
.Jete inittetor: Stout M. D.
G O
O i r2497 VT Leed: Nort. Anthony A B
O O
i2SS7 VT Mgt: Schopfer, Don K Q
Q Q
12/597 IRC Chmn: Sin 0h. Anand K O
O O
12*S7 D.i.:
INVALID:
Date:
RESOLUTION:
PreviouaJy Montifled try h07 O Yes E#' No hno Dwrepent condmon 70 Yes ' #i No Resolution Penchwj?O Yee 4 6. No Re.oeution unre.oived70 Yes (S) No Review
^** *E *
- *N' initiator: (none) b b
VT Lead: Nort, Anthon, A VT Mgt: Schopfer, Don K IRC Chmn: SagN hard K Date:
sL Commerds:
l Pttnted 12/11197 9 49 36 AM Page 1 of 1
. ~
Northeast Utilities ICAVP DR N2. DR MP34707 Millstone Unit 3 Discrepancy Report Review Group: system DR VAUD Review Element: System Design p
DierWine: Electncel Desgn Om Deecropency Type: Calculaten No SystenVProcess: HVX NRC Slgenconce level: 4 Date faxed to NU:
Date Published: 12/t497 Discrepency: Arc Suppression Capacitors for Solenoid Operated Valves (Calculation 3 ENG 097)
==
Description:==
Calculatl0n 3 ENG 097 selects capacitors to be installed across the coils of some solenoid operated valves to suppress arcing across the relay contacts that control the valves. We have the following comments on this calculation:
Because of the way the loop current is defined, there is a sign enor in Equation 6 on page 4. There is also a sign error in Equatlan 9 on page 5. As a result, the solution of the differential equation is a sinusoid, not exponential. $1nce the relay contacts interrupt the current at a current zero, and since the circuit is essentially purely inductive, the current zero will occur at the voltage peak. Therefore, the magnitud1 of the voltage across the solenold coil will be equal to the peak vilue of the control voltage or about 170 volts.
In order to understand how to suppress the arc, it is necessary to review what happens when the current is first broken. The voltage across the relay coil will osci: late at a natural frequency that is determined by the inductance of the solenoid coil and the capacitance in parallel with it. (if the proposed capacitor was not installed, the naturally occurring stray capacitances determine the natural frequency.) The transient recovery voltage seen by the relay contacts is the difference between the control voltage and the voltage across the relay coll. At the tirae that current is first broken, this voltage is zero. The voltage across the solenoid coil will then oscillate at the natural frequency of the relay coil and parallel capacitance. Assuming that this frequency is much higher than the 60 Hz mains fioquency, a voltage equal to twice the peak control circuit voltage will appear across the relay contacts after a half cycle of the solenoid coil oscillation. Since the insulation strength of the contacts cannot recover instantaneously, there is a possibility for the contacts to break down, striking an arc (restrike). Depending on how fast the insulation strength of the contacts recovers, there can be multiple restrikes, and the voltage of the restrikcs can escalate.
Increasing the capacitance across the relay coil does not chtnge the magnitude of the voltage across the solenoid coil following the initial current interruption. However, addi'v.; the capWtance a.
lowers the natural frequency of the voltage oscillatio'is across the solenoid coil. Lowering this natural frequency allows more time for the insulation strength of the opening contacts to recover. This reduces the likelihood of restrikes.
Review Ve#d invalid Needed Date loilletor: Bloethe.G WMiem 11/2297 Printed 12/11/97 9 s5:10 AM Page 1 of 2 ww y
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Northeast Utilities ICAVP DR No. DR MP3 0707 Millstone Unit 3 Discrepancy Report Irwhetor; beethe,G.Weem O
O O
iiizzeer VT LAe4: Nwt, Arthony A Q
Q 11/2&97 VT Mgri Schopfw, Don K Q
12597 1RC Clunn: Segh, Anand K Q
Q Q
12,997 Deie:
INVALID:
Date:
RESOLUTION:
Prev 6ously ksentmed by NU7 Q Yee
- 1 No NonD6ectopardCondstu?C) Yee
'9) No Resolution Pend 6ng?O Yee + No Res ivison unroeoived70 vee
<W) No Review Accepteb6e Not Accepteble Needed Date VT Leed: Nort, Anthony A VT Mgt: Schopfer, Don K IRC Chmn* Singh, Anand K Date:
SL Comments:
Printed 12/11/97 9 5514 iM Page 2 of 2
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Northeast Utilities ICAVP DR No. Dft-MP3-0713 Millstone Unit 3 Discrepancy Report Review Group: System DR VAllo Review Element: System De@"
Peterdbol Operab68aty lasue Discipl6ne: En.tronmnental ovahfcaten O ve.
Descrr.pency Type: Calculate
- 1 No SystemProcess: OSS NRC Sign 6nconce level: 3 Date faxed to NU:
Dele Published: 12/1497 Discrepency: Equipment Qualification Discrepancy Descript6on: EEQ TRA 113.0, Rev.1, dated 1/14/1997 is the Electrical Equipment Qualification Test Report for Class IE General Electric (GE) Quench Spray Pump Motors (Plant I.D. No.
30SS*P3A.B). It states on Sheet 2 of 7 that the GE test report GEK 42842 titled
- Topical Report IEEE 323 Class IE Induction Motors, Horizontal Class B Insulated, Model Numbers 5K821051C40. SK821054C26, SK828840C88', dated December 1978 meets the requirements of DOR instead of R>G 1.89, Rev.
1 and IEEE 323-1974.
This c'a 'lusion was based on the fact that the motor qualification in the GE Topical Report was based on separate testing and operating experience which does not meet the requirements of IEEE 323-1974.
However, the Procurement Specification No. 2441.003-009, Rev.
2, page 1 17 of states that these pump motors should be environmentally qualir d in accordance with IEEE 323-1974.
e Also, Millstone FSAR Section 3.11B.2.2 states that the Environmental Qualification of all safety-related equipment shall meet the requirements of IEEE 323-1974, the intent of NUREG-0588, and NRC 10CFR50.49.
Review Valed lovelid Needed Date inittetor: Yassan. S.
O Q
Q 11/2497 VT Lead: Nwn. Anthony A D
0 0
i$rsS7 VT Hgr: Schopfer. Don K Q
Q Q
12/5/97 IRC Chmn: singh, Anand K Q
Q Q
12/997 Date:
INVALID:
Date:
RESOLUTION:
Previously Montined by NU7 O Yes
- 1 No Non P.acrepent Cond# tion?Q Yes
- 9) No Resolut6on Pend 6ng?O Yes 4 No Ruolutkm Unresdeed70 ve.
+ No Rev6ew Initiator: (rure)
VT Lead: Nort. Anthony A VT Mgr: SJopfer. Don K
~
IRC Chmn: Singh. Anand K
_e SL Commenta:
Printed 12/11/97 9 $9 29 AM Page 1 of 1
Northeast Utilities ICAVP DR Ns. DR4AP34715 Millstone UnN 3 Discrepancy Report Review oroup: spte DR VAuD Potential Operately issue D6ecipl6ne: E'wtncel Design O ves 06ecrepancy Type: Calculeton No SysterWProcess: N/A NRc S6gnificance level: 4 Date faxed to NU:
Dele Published: 12/1497 Discrepancy: Discrepancit.,in Control Cable Ampacity Calculation l
Descript6on: The review of Calculation #173E 'To Determine Ampacity of 'C' Cables Installed in Tray or Conduit
- Identified miscellaneous discrepancies in the calculation. The specific items are as follows:
- 1)Section I.A.2 of the calculatioil states that for loads greater than 7.5 A a cable is assigned a *K' service. The source for this design input (i.e., installation or design document) could not be identified. CCN #1 page 1, paragraph 3 implies that the subject calculation is the design t> asis for this input. This same CCN (page 2) identifies instances of 'C' cables exceeding 7.5 A.
- 2) Section 8 of the calculation identifles the equation for the correction factor due to number of cables, but omits the ratio of cable diameters from the equation. This omission is editoriaiin nature since the correct equation was used in the body of the calculation.
- 3) CCN #1 uses a methodology which uses 50% of calculated cable area since the loading of cables in the trays is assumed to be 50% of the allowed load. A basis for this methodology could i
not be identified. Also, an adjustment in direct proportion to the reduced loaalng is not conservative due to non uniform heat intensity in the cable tray.
These discrepancies are not considered to adversely impact the output of the calculation. There otill appears to be enough conservatism in the sizing of 'C' cables to ensure adequate ampacity. For this reason this discrepancy is rated a Significance Level 4.
Review Valid invalid Needed Date initutor: Kish, J.
O O
O 11i2497 VT Lead: Nort, Anthony A O
O O
'1/:SS7 VT Mgr: Schopfer. Don K O
O O
i /s97 IRC Chmn: singh, Ane2 K Q
Q Q
12/&97 Date:
INVAUD:
Date:
RESOLUTK)N:
Prevbusty identifled by NU? O Yes
- 1 No Non Discrepent CondWon?Q Yes t No Resolution Pending?O Y
- 4) No Resolution Unresolved?O Yes I No Pnnted 12/11/97 9 $6 21 AM Review Page 1 of 2
Northeast Utilities ICAVP DR N3. DRMP3-0716 Mill tone unk 3 Discrepancy Report ue.<.u.
m ue.e u.
m u.
VT Latd: tief1, Afthony A O
O O
VT Mert Schopfer, Don K IRC Chmn: Sm Anand K SL ConsnetWs:
Printed *2/11/97 0 56 25 AM Page 2 of 2
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Northeast Utilities ICAVP DR N. DR MP34720 Millstone unk 3 Discrepancy Report Rev6ew OroLp: Conf 9ureton DR VALID Rev6ew ElemeM: Systern DM yi Potent 6alOperabasty losue D6acopline: I & C Desgn O va D6ecrepancy Type: Drewvg e) No Systen6Procese: ifA NRC Signifkance level: 4 Date faxed to NU:
Date Published: 12/i497 thecrepeaCY: Drafting / Drawing Errons
==
Description:==
The following drawing discrepancies were noted during the documentation review for the systems.
- 1) Drawing EK 26A Rev.14 incorrectly identifies 3SWP FT59C as 3SWP PT 590.
- 2) Drawing 2472.710 392 338, for Foxboro instrument Cabinet 3CES IPNLl12 erroneously associates 400 instruments to a 3CWS loop by the title of the drawing.
- 3) Test loop diagram 25212 30348, Sheet 1, Rev. 2, erroneously identifies instrument 3RSS TY21 A, located in Cabinet 3CES-IPNLl12 as 3RSS TY21.
Review Val 6d invalid Needed Date inittetor: Server, T. L.
O O
O iir2ss7 VT Lead: Nort, Anthony A O
O O
iir2as7 VT Mgr: Schopfer, Don G G
O O
125S7 IRC Chmn: Singh, Anand K O
O O
$2/as7 Dete:
INVALID:
Date:
RESOLUTION:
Prev 6ously identified by NU7 O Yes t 9 ' No Non Dierepent Condet6cn?O Yes ~Iti No Renniut6on Pending?O voo + No Resolutkmunroodved?O ves + No Review Acceptable Not Acceptable Naeded Data VT Lead: Nort, Anthony A VT Mer: Schopfer, Don K IRC Chmn: Singh, Anand K Date:
SL Comments:
Printed 12/11/97 to 01:13 AM Page 1 of Y
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Northeast Utilities ICAVP DR N2. DR MP3 0721 Millstone UnN 3 Discrepancy Report Review oroup: conr,eton DR vAuD e
Potenual Operabl641y lasue D6ecip66ne: I & C Desgn O Ya D6ecropency Types instakaan trnplementeten
- 6) No System 8 Process: SWP NRC SigrWAcence level: 4 Date faxed to NU:
Date Publ6shed: 12/1497 D6*creparry: Grounding not in accordance with specification Descripuon: Electricalinstallation Speci0 cation SP E 350, Rev,9 sets forth installation / condition requirements for grounding of instruments and raceways connecting to instruments / field devices. In addition, instrument vendor i.1anuals provide for the grounding requirements and maintenance of grounds. The following conditions not consistent with the above referenced requirements were observed during the system walkdowns.
- 1. Instruments 3SWP*PDIS 24A, B, C, D, and pressure transmitters 3SWP POIS 110A, B, C, D located in intake structure / pump house have instrument grounds which, in general, show considerable oxidation and lack the necessary 3-inch
- slack loop
- In the ground wire required by SP E 350 3.3.11.
- 2. The required 3 inch
- stack loop
- In the ground cables requirca by Speci0 cation SP E 350 3.3.11 has not been provided for the following instruments:
3SWP FIS41 AOCDrawing BK 16F-651 3SWP PS15280CDrawing BK 16P 67 6 The following material conditions were noted during the walkdown. These are not con 0guration management issues,
- 3. The ground wire for instrument 3SWP*PLiS28, reference BK-16P 67 6, shows excessive signs of oxidization / corrosion.
- 4. Instrument ground wire cable for 3SWP*PS152A,ieference drawing BK 16P-67 6, is disconnected from flex conduit.
Review Vand invalid Needed Date initiator: server. T. L 8
0 O
" *S7 VT Lead: Nort. Anthony A O
O O
$ 'mS7 VT Mort Schopfer, Don K O
O O
12sS7 1RC Chmn: Singh, Anand K O
O O
'MS7 Date:
INVALID:
Date:
RESOLUTION:
Prev 6ously idenuned by Nu? O Yes
'98 No Non Discrepent Condeuon?O Yes
'Si No Resolution Ponding?O Yes
- 6) No Resolut6onUnresolved?O Y.
s) No Review Dnnted 12/114710 05 22 AM Page 1 of 2
.. ~..
Northeast UtilMies ICAVP DR N2. DR.MP3-0721 Millstone unk 3 Discrepancy Report Acceptable Not Acceptatus Needeu Date inMWs M VT Leed: Neft. Anthony A VT Mgt: Schopfer Don K IRC Chmn: Singh, Anand K Date:
SL Comments:
Printed 12/11471005 26 AA4 Page 2 of 2
P Northeast Utilities ICAVP DR No. DR MP3 4722 Millstone Unit 3 Discrepancy Report Review Group: Confguration DR VALID Potential Operability issue Diecip66ne: 1 & C Dea *"
O va D6screpency Type: Instasiaten irnplernertaten el No Systemfrocess: DOX NRC &lgnificance level: 4 Dde rAXed to NU:
Date Published: 12/1497 D6ecrepency: Grounding not in accordance with specification
==
Description:==
Electrical Installation Specification SP E 350, Rev. 9, Section 3.3.11 sets forth installation / condition requirements for grounding of instruments and raceways connecting to instruments / field devices. These requirements include a 3-inch
- slack loop
- In the ground wire. Contrary to this requirement, the following installations do not have the 3 inch slack loop:
3EGF LS28A 3EGF LTDA 3EGD-PDIS25A Rev6ew Val 6d invol6d Needed Date inetletor: Server, T. L.
O O
O iir2ss7 0
O iir2as7 VT Lead: Nort. Anthony A VT Mgr: Schopfer, Don K g
g g
12/597 IRC Chmn: $1ngh. Anand K O
O O
1:'6S7 Date:
INVALID:
Date:
RESOLUTION:
Previously ident6 fled by NU7 O Yes
'#) No Non Discrepent Condet6on?O Yes tGi No Resolution Pending70 ve.
- > No Resolution Unresolved?O ve.
+ No Review a
Acceptable Not Acceptable Needed Date VT Lead: Neri, Anthony A VT Mgr: Schop'er, Don K IRC Chmn: Singh, Anand K Date:
sL Conwnents:
Printed 12/11/9710 06 24 AM Page1 d 1
Northeast Utilities ICAVP DR N2. DR-MP3 0724 Millstone Unit 3 Discrepancy Report Review Group: Systern DR VALID Potential Operoidisty issue Diecipl6ne: Mecherucal Desg" O vee D6ecrepency Type: Componert Date
- ,, g SystenvProcess HVX NRC Sign 4Acance level
- 3 Date faxed to NU:
Date Putdished: 12/1497 D6*cr*Pency: SLCRS and ABVS Filter Unit Backup Adsorbent Cooling Mechanism Deecr6ption: During review of the supplementary leak collection and release system (SLCRS) filter units 3HVR*FLT3A/B and auxiliary building ventilation system (ABVS) exhuast filter units 3HVR*FLT1 A/B a discrepancy was identified regarding backup adsorbent cooling.
FSAR Table 1.81, Reg. Guide 1.52, Rev. 2, Position C.3.k exception states
- Exception is taken to the requirement of any cooling mechanism satisfying single-failure enteria because e backup mechanism is provided."
The backup cooling mechanism referred to in the Reg Guide exception was nc found in the review of the system P&lDs and physical drawings, Rev6ew Volki invalid Needed Date enettator: Stout, M D.
O O
O St'2SS7 VT Leed: Nort Anthony A O
O O
15':SS7 VT Mgr: Schopfer, Don K O
O O
1:/5S7 IRC Chmn: singh, Anand K O
O O
12'SS7 Date:
IfW AllD:
Date:
RESOLUTION:
Prev 6ously identined by NU? O Yes it' No Non D6screpard Condst60n?Q Yee
- 1 No Resolution PendingrO vee
'*1 No Resolution Unresolved?O Yee
- ) No Revbew Acceptable Not Acceptable Needed Date
,g VT Leed: Nort, Anthony A VT Mgr: Schopfer, Don K IRC Chmn: Singh, Anand K
-e, SL Comments:
PrrWed 12/11/97 to 07.4s AM Po p 1 of 1
l Northeast Utilities ICAVP DR N3. DR-MP3-0699 Mitistone unit 3 Discrepancy Report Rev6ew Group: system DR INVALlo Rev6ew Element: Systern Design Potential Operabi4Wy issue Diecipime: Envronmnental Duahficate" O ve.
Discrepancy Type: Calculaton el No SysterrVProcess: Rss NRC Signancence level: 3 Date F Axed to NU:
Date Published: 12/1497 Discrepency: Inconsistent component qualified life
==
Description:==
The Reactor Coolant System (RCS) Ventrak Pressure Transmitters 3RCS*PT455,456 are located inside the Millstone Unit 3 Containment Structure in Environmental Zone CS-02.
In the Component Replacement Schedule, File No.
2240.000.001, CAS Revision No. 4, Note no. 5, states that "the equipment should be replaced at the end of its qualified life of 17.35 years'. Also, the System Component Evaluation Worksheet, dated 11/06/85, revision 3, Docket: $0 243 states that the equipment is qualified for 11.43 years. However, the Westinghouse Report EODP ESE 1B Addendum, Rev. O, dated 11/84, Section 1.9 Page 6, limited the qualified life of the equipment to only 10 Years.
Also, in Westinghouse Equipment Qualification Test report No.
WCAP 8687, Supp. 2 E01B, Addendum 1, Revision 0, dated November 1964 for Veritrak Pressure Transmitters. Group A states in Section 1.0, page 1 that Westin0 house 'mur' tithdraw from a qualified life of 14 years as is stated in Phase.: summary (Section 7.1.2) and use the qualified life of 10 years which was established in Phase I for the electronics as the verified quallfled life of the Group A Veritrak Model 76PH2 Pressure Transmitters.
Rev6ew V616d inval6d Needed Date inMietort Yessin, s.
O Q
Q 12/197 VT Lead: Nort, Anthony A O
O O
'nS7 VT Mgt: schopfer, Don K O
O O
i:/'i'87 IRC Chmn: Singh, Anend K Q
Q Q
cate:
11/28/g7 INVALID: Based on the newly Submitted NNECo Calculation No. 79-236-1061 E3 Titled " Calculation of Qualified the for Veritrak Transmitters (Model Type 76PH2 & 76DP2) Located at Millstone Unit 3, it is shown that the qualified life of the transmitter can be extended to 17.35 yes. instead of 10 years. That was based on the Phase il Testing Program which resulted in a more defined activation energy (0.65 eV) specific to the transmitter in ileu of the conservative value of 0.$ eV defined in Phase 1.
Date:
RESOLUTION:
. Prev 6ously identined by Nu? O vos tG) No Non Discrepant CondH6on?O vos o' No Resolution Pending70 ve.
=> No Re.oiui>on unre.olved70 ve.
+ No Review Aes;optable Not Acceptable Needed Date VT Lead: Nort, Anthony A Prt.ded 12/11/9710 09 47 AM Page 1 of 2
f North 2ast Utilitl2s ICAVP DR No. DR MP3 0599 Ministone Unit 3 Discrepanre Report
.o.~.-.,
O O
O VT Mgr: $;hopfer, Don K IRC Ctrm: Singh Anand K O
O Date:
SL Corrynstds:
Prvtec 12/119710 09 51 AM Page 2 of 2
North 2ast Utilities ICAVP DR No. DR-MP3 0037 Millstone Unit 3 Discrepancy Report Rev6ew Group: Prog *ammate DR RESOL 18 TION ACCEPTED Rev6ew Eternent: Conecttvo Acton Prtcess p
Diulpl6ne: Other Om h
Discrepancy Type: Conective Acton SysterrvProcess: $WP l
NRC Signifncance levat: 4 Date faxed to NU:
Date Putstashed: 9/11/97 0.mcrepancy: Inadaquete response for resolving the final status of the Auxiliary
(
B'silding 0 Ventilation Heaters.
3 DourlPuon: The ACR # M3 96 0310 initiator recommends adding the safety related Auxiliary Building Ventilation Heaters as a
' required load' for coping with a SBO.
The ACR Causal Factor Corrective Action Plan's item 1 A is not clear if an evaluation will be made to determine whether or not I
the safety related Auxiliary Sullding Ventilation Heaters are a
- required load
- for supporting the SBO Safe Shutdown..
The Corrective Action must include this determination along with any necessary revision to the appropriate calculation.
Rev6ew Valid involut Needed Date inMietor: Caruso, A-Q O
O SSS7 VT Lead: Ryan, Thomas J O
O O
$'3'S7 VT M fi Sch0P ef. Don K Q
Q Q
4397 f
0 IRC Chmn: Singh, Anand K Q
Q Q
9697 Dele' 9/3/97 INVALID:
Date: 11/19/97 RESOLUTION: Disposition:
NU has concluded that the issue reported in Discrepancy Report, E
DR MP-0037, does not represent a discrepant condition. The corrective action statement of "la" of the ACR clearly says to
- ldentify additional syrcnis/ equipment required to,spport SBO Safe Shutdown..." The attachment to the Corrective Acthn Plan states that a teview of the Safe Shutdown Scenario Document (SSSD) did not result in the identification of any unique " winter coping" issuer.
The attachment further states that wnile the Auxiliary Building heaters were not identified as required loads, the SBO diesel loading calculatinn did account for the heaters as they were part of an MCC *1ur' sped" load. Additionally, calculation PA 90-050-0308E3 was revised 6/19/97 and the Auxiliary Building heaters are shown as a required load. The A/Rs created to track identification of adition.cl systenis/ equipment required to support SBO safe shutdown, identify procedure revisions / equipment modifications required and update SP EE-363 and revise SBO loading calculation PA 90 050-0308E3 were all accepted 2/24/97 prior to start of the ICAVP process. Table 1 O of SP EE 363,' Station Blackout Safety Shutdown Scenario Document" shows the Auxiliary Building heaters as being Printed 12/11/971011.52 AM Page 1 of 2
Northeast Utilities ICAVP DR No. DR MP3 0037 Millstone Unit 3 Discrepancy Report available for supporting long term decay heat removal.
Significance level criteria do not apply here as this is not a discrepant condition.
Attachments: PA 90-050-0308E3, Rev.1
==
Conclusion:==
Nu has concluded that the issue reported in Discrepancy Report, DR MP3-0037, does not represent a discrepant condition. The evaluation of required loads to support SBO Safe Shutdown was performed.
Additionally, calculation PA 90-050-0308E3 was revised 6/19/97 and the Auxiliary Buildir)g heaters are shown as a required loso.
The A/Rs created to track identification of additional systems / equipment required to support SBO safe shutdown, identify procedure revisions / equipment modifications required and update SP EE 363 and revise SBO loading calculation PA 90-050-0308E3 were all accepted 2/24/97 prior to ihe start of the ICAVP process. Table 10 of SP EE 363, Rev. 2," Station Diackout Safe Shutdown Scenario Document" shows the Auxiliary Building Heatens as being available for supporting long term decay heat removal.
Significance level criteria do not apply here as this is not a discrepant condition.
Prevlously identtaed t>y NU7 O Yes
- 1 No Non06ecropentConet60n?4 Yes Q No ResoluuonPending70 vos
- 6) No n.coiuiionunt *.d?O Yes (6) so Rev6ew inat6etor: Caruso, A.
VT Lead: Ryan. Thomas J O
mW VT Mgt: schopfer. Don K IRC Chmn: S@. Anand K Date:
11/1g/97 st Comments: NU's response is acceptable. The Calculation PA 90-050-0308E3, Revision i included Table 2B entitled 'SBO Loading" which tabuletes the SBO Minimun Required Loads on the Motor Control Centers. It was noted that Table 2B included the Auxiliary Building Ventilation Heaters 3HVR*UHE 5, 6, 7 and 8 and that they have been assigned a diversity factor of 100%. In addition.to revising Calculation PA 90-050-0308E3, NU revised Table 10 of SP EE 362 as noted above to add the Auxiliary Building Ventilation Heaters.
Pnnted 12/11/97 to 11.56 AM Page 2or 2
t Northeast Utilities ICAVP DR N2. DR-MP3-0042 Millstone Unit 3 Discrepancy Report Review Oroup: Conf uraten DR RESOLUTION ACCEPTED 9
Review Element: System inatelleten p
g Deec6 plane: Piping Doogn Om Diacropency Type; installaten Requtements SystemfProcess: EWP NRC SignP wee level: 4 Date faxed to NU:
Date Putnehed: 9/11/97 Discrepency: Walkdown D!screpancies of the SWP in the Pump House.
Trains B & D Desertpuon: The following discrepancy items were found during the walkdown of the piping and mechanical equipment of the SWP Trains B &
D in thJ Pump House:
- 1. Valve *V77 on Pl23B instrument 15ne was in the closed position with pump 3SWP*PIB running. Pressure page Pl23B was showing pressure indicating possibly a poor valve seat.
- 2. Line 3 SWP-00310 appears (pipe is insulated) to have a flanged joint in the pipe between pipe support PSA033 and the elbow before the strainer 3SWP*STRIB that is not shown on the isometric Cl SWP-247 SHT 5 Rev 11,
- 3. The insulation is coming off of the flanged end of line 3-SWP-003M47.
Review Valid invalid Needed Date inetnetor: Reed. J W D
O O
S'557 VT Lead: Nort, Anthony A O
O O
9/s97 VT Mor: schopfer, Don K Q
Q Q
S$97 IRC Chmn: sryh. Anand K Q
Q Q
BB97 Date:
INVAllD:
Date: 10/10/97 RESOLUTION: Disposillon:
NU has concluded that the issues reported in items # 2 anS 3 of Discrepancy Report, DR MP3-0042, have identified conditions not previously discovered by NU which require correction.
Item #2: The flanges were added by PDCR MP3-87101 and are shown on the fabrication isometric C.I. SWP 247 SH 1 however, the 'PLl* isometric C.I, SWP 247 SH 5 was not updated as required. Item #3: Trouble Report 12M3105622 has been initiated to schedule ar'd correct this issue. In general
- Materiel Condition
- of plant systems is a subject that will be addressed during the performance of system readiness reviews and walkdowns in accordance with EN 31097. These revbws and walkdowns commenced on September 22,1997 and are scheduled to be completed prior to Mode 4. CR M3-97 3233 has been wntten to provide the necessary corrective actions to resolve these issues. NU has concluded that item # 1 reported in Discrepancy Report, DR MP3-0042, does not represent a discrepant condition. This was investigated and determined to be Pr1 rte:112/11/97 to 12 45 AM Page 1 of 2
\\
m og.% E Wties ICAVP DR Ns. DR MP3 0042 i
Milld Discrepancy Report as a resurt of pressure being locked between the isolation valve and the Cage. The valve was cycled and the gage reads correctly.
==
Conclusion:==
NU has concluded that the issues reported in items #2 and 3 of Discrepancy Repntt, DR MP3-0042, have identified conditions not previously discovered by NU which regulle co Tection. Tne s
'PLl* drawing will be updated and the materiel condition f
corrected. CR M2 97 323') was written to provide the necessary 4
corrective actions to resolve this issue. NU has concluded that item # 1 reported in Discrepancy Report, DR MP3-0042, does not represent a discrepant condition. This was investigated and Catermined to be as a result of pressure being locked between the isolation valve and the gage, the valve was cycled and the gage reads correctly.
~ Previously kdk.wd by NU7 O Yes Joi No Non Discrepent Condstion?O Yee
'9) No Kasolutio.< Pendang?O vee
- > No no.oivison unreeoived70 vee
- 4) No Review Acceptable Not Acceptable PW Date e
imm RM 1 %,
VT Leae Nort. Antt.vgr A VT Mgr: Schopfer, Don K IRc Chmn: singh, Anend K 7
Date:
g SL Comments:
E F
[
w E
Printed 12/11/9710.12.48 AM Page 2 of 2 l
2 N:rthea:t Utilit::s ICAVP DR No. DR-MP3-0021 Millstone Unit 3 Discrepancy Report Review Orpup: Acedert Mitigation DR RESOLUTION REJECTED Discipline: Otho' Potential Operabildy iss.ue Discrepancy Type: Ucensang Docurnert Om Systern/ Process: N/A IG) No NRC Significance level: 4 Date faxed to NU:
Date Published: W22/97 i
Diur*parcy: Westinghouse Comments on FSAR Section 15.0 Descripoon: We have reviewed Westinghouse Electric Corporation letter NEU-97 536,
- Northeast Utilities Service Company Millstone Unit 3 Review of FSAR mapter 15," dated April 8,1997, which provided NU suggested page markups for FSAR Section 15.0, introduction. The purpose of these commer:ts and markups was to provide assurance that the Millstone 3 ?SAR is consistent with the Plant Safety Evaluation of record for the current fuel cycb.
The comments on this section identify changes to Figure 15.0-21 and Table 15.0-2. These changes have not been incorporated into the FSAR, making the FSAR inconsistent with the Plant Safety Evaluation.
A review of applicable corrective action databases for Millstone 3 has not identified any pending FSAR change notice Itoms that will inurporate the Westinghouse comments into the FSAR.
Review fp Valid Invaled Needed Data Initiator: Johnson W.J.
O O
O atit/97 y+
VT Lead: Raheia. Raj D D
D 0
e<tirs7 VT Mgr: schopfer, Don K O
O O
8'12/S7 IRC Chmn: singh, Arv.nd K G
O O
at 2s7 Date:
INVALID:
Date: 11/18/97 RESOLUTION: Disposition:
FSAR CR 97 MP3-91, initiated 2/27/97, incorporated all Westinghouse comments from letter NEU 97 536 pertaining to Chapter 15.0. Refer to attached copy of FSAR CR 97-MP3-91 attached to M3-lRF-00260 (ICAVP Response to DR-MP3-0017) for changes associated with FSAR section 15.0. The FSAR CR is currently In the review process with PORC 3pproval expected by 10/21/97
==
Conclusion:==
DR-MP3-0021 identified a discrepant condition with FSAR Chapter 15.0 that NU has previously cddressed. The subject Westinghouse letter ar.c comments were evaluated ana will be incorporated into FSAR section 15.0 through FSAR CR 97 MP3-
- 91. No further action is required.
Previously ider.tmed by NU?
(._) ves
'#1 No Non Discrepant CondiDon?O ves t No Resolution Pending?O ve.
@ No Re.oiution un,s >ived?O ve.
@ No
_R_evkw Printed 12l 7 10:16:44 AM Page 1 of 2
Northe:st Utilities ICAVP DR N3. DR MP3 0021 M:llstone Unit 3 DISCNpaticy Report initiator: Johnson, W. J.
"W 0
0 Q
VT Lead: Rahem Raj D VT Men Schopfer, Don K IRC Chmn: Singh, Anand K Date:
11/18/97 st comments: A comparison of FSAR CR 97 MP3 91 with Westinghouse letter NEU 97 536 confirmed that most of Westinghouse comments have been included in the FSAR change, There were two exceptions noted on Table 15.0-8, page 4 of 4:
- 1. The steam generator tube failum Reactor Trip Function
" manual" was not included.
- 2. The Steam generator tube failure Other Equipment
" pressurizer power opeisted relief valve or pressurizer spray" was not included.
The text of the FSAR change old not discuss why these were omitted.
Prtnted 12/11E' 10:16 46 AM Page 2 of 2
Northeast Utilities ICAVP DR N 2. DR-MP3-0047 Millstone Unit 3 Discrepancy Report 3
Rev6ew Group: system DR RESOLUTION REJECTED Rev6ew Elemord: system Desgn p
D6ecipline: structurel Desg' Om Diecrepency Type: Celculaten 4g SysterrvProcess: sWP
~
NRC Significence level: 4 Date FAKod to NU:
Date Published: &T&97 D6ecrepenc/: Pipe support calculation discrepancy
==
Description:==
We have reviewed the Pipe Support Calculation Nos. NP(F)-
Z19A 159 Rev. 7
& NP(F)-Z19A 195, Rev. 8. Based upon this review we have
~
no'od the following discrepancy.
i These calculations do not address the welds shown on drawing BZ 19A 78, Rev.3. between items 5 & 6, and between item 6 and the strap plate.
Review i
Valid Invalid Needed Date initiator: Petel, A.
O O
O
&'20S7 VT Leed: Nort, Anthony A O
O O
&2n97 VT Mgr: schopfer, Don K O
O O
rn2/97 IRC Chrrn: srgh, A,end K O
O O
sus 7 Date:
INVALID:
Date: 10/15/97 RESOLL' TION: NU has concluded that the issue repc'ted in Discrepancy Report, DR-MP3-0047, does not represent a discrepant condition. The weld for item; 5 to 6, item 6 to the strap plate, as well as item 5 to the embedded plate are all qualified on page 26 of calculation 12179-NP(F)-Z19A 159 utilizing ine worst case bounding dimensions and loads.
Significance Level criteria do not apply here as this is not a discrepant conditio:t Praviously identifled by NU? O Yes
- 48) No Non D6screpent Condstion?O Yes ? No Resolution Pending?O Yes + No ResolutionUnresolved?O Yee
- 6) No Review Inttletor: Patel, A.
VT i eed: Neri. Anthony A VT Mgt: Schopfer, Don K IRC Chmn: singh, Anand K Date:
g/24/97 st Comments: In response to NU's disposition of the referenced discrepancy, S&l's position is further clarified as fol'ows:
On page No. 26, the calculation has been performed for 1/4" Parallelwelds between the following items as shown in the drawing 12179-BZ-19A-42 3 ( sht.1 of 3).
a) TS 6x4 to 1" thick plate.
Printed 12/11/9710.71:14 AM Ptye 1 of 2 l
L Northecst Utitities ICAVP DR No. DR-MP3-0047 Millstone unit 3 Discrepancy Report b) 1" thick plate to embedment plate, c) Plate 3/4*x 5 ?!4*x 8' to TS 6x4 The above items do not include the weld calculations for the items as mentioned in our discrepancf report 1.e. betweer, itein No's 6 ( TS 4x4x.25) & 5 ( TS 6x4x.25) and between item No. 6 & strap plate. Thet,e are 3/16" 4 sided and 1/4" all around welds respectively and therefore are different from the ones qualified on page No. 26.
While we agree with NU's assessment that these welds are not entical a 1d could be bounded by the calc on page #26 or by the
- PREPS" qualified weld for member #4, joint #4 (See calculation page # 25), a statement documenting this engineering judgment must be included in the calculation.
e 1
t Ertnted 12/114710.21:17 AM c ge 2 of 2 a
1 NortMast Utilities ICAVP DR Nr. DR-MP3-0052 Millstone Unit 3 Discrepancy Report-Review Group: System DR RESOLUTION REJECTED Potential Operabilty issue Diecioline: Structuiet Design Om Discrepancy Type: Calculat;on SystenVProcess: Rss NRC Signincance level: 3 Date faxed to NU:
Date Pubil6h6d: &2&97 D'acr*pancy: Pipe support calculation discrepancy Descr6pt6on: We have reviewed Pipe Support Csiculations No.12179. NP (F).
Z798-086, Rev. 2 & CCN NO.1.
Based on this review we have noted the following discrepancies.
- 1. The forces & moments used to check the welds on pages 20-23 are inconsistent with input data from pages 9 & 10, 2 The force FX = 4809 # on page 17 is inconsistent with the force FX = 4764 # on page 24.
S. On page 18, M2 should be 858 instead of 2189.
Review Val 6d inval66 Needed Date initiator: Patel, A.
O O
O at2o97 VT Lead: Not, Anthony A O
O O
62SS7 VT Mgr: schopfer, Don K Q
Q Q
&%97 1RC Chmn: f agh, Anand K O
O O
SnS7 Date:
INVAllD:
DMe: 10/17/97 RESOLUTION: NU has concluded that item #1 reported in Discrepancy Report, DR MP3-0052, does not represent a discrepant condition. The confusion is due to the difference between the pipe stress data and the pipe support data inputs. They are correct as written. NU has concluded that items #2 and #3 reported in Discrepancy Report, DR-MP3-0052, have identified conditions not previously discovered by NU which require correction. The calculations will be revised to correct items #2 and #3 of DR-MP3-0052. CR M3-97 3123 was initiated to provide the necessary corrective actions to resolve this issue.
Prev 6ously 'dentined by NU? O ves @ No Non Discrepant Condition?O vos @ No Resolution Pend:ng?O yes + No Resolution Unresolve.d?O ves + No Review initiator: Patel. A.
VT Lead: Neri, Anthony A VT Mgr: schoofer. Don K
~
IRC Chmn: Singh, Anand K oste:
10/17/97 sL Comments: 1) NU's response for items # 2 & 3 of the discrepancy is acceptable.
Pnnted 12/11/9710:22-27 AM Page 1 of 2
Northeast Utilities ICAVP DR N2. DR-MP3-0052 Millstone Unit 3 Discrepancy Report
- 2) NU's response for item #1 of the discrepancy report is not acceptable.
The NU response does not explain why the differences between the pipe stress data and the pipe support data are ' correct as written',
in Calculation 12179-NP(F)-Z79B-086 Revisior 2, the design loads for qualification of the weld (Member 4 at Joint 4, see page
- 16) are noted on page 20 as :
GF1 = 268 #0M1 = 24.115 in #
CF2 = 1,230 #CM2 =
487 in #
OF3 = 4,017 #CM3 = 1,942 in #
The force F1 and Moment M3 are much smaller than the loads which would be expected at Member 4 st Joint 4 for the pipe spport geometry and the lateral (Fx) ppe reactions of 4969 #
(see page 9) applied at joint 5. Similarly, the force F3 and Moment M1 appear to be later than loads which would be expected. The weld at Joint 4 appears to be overstreesed when the weld qualification loads are correctly computed for the specified pipe reaction loads.
Similar discrepancy exists for the weld for Member 9 at Joint 2 (see page 16).
If our understanding of the pipe reactions or the weld qualification loads is in error, please clarify. We are upgrading the significance level for this discrepancy to 3 because the weld may be ovestressed.
sub.
Pnnted 12/11/9710-22:30 AM Page 2 of 2
Northeast Utilities ICAVP DR N3. DR-MP3-0076 i
Millstone Unit 3 Discrepancy Report Review Group: system DR RESOLUTION REJECTED Potentiel Operabilty issue Diecipline: Pong Design 4
Discrepency Type: Calculate No System / Process: Rss NRC Signmcance level: 3 Date faxed to NU:
Date Fublished: 8/31/97 Diecrepancy: Max Operating Temperature Exceeds Allowable for Unsleeved Containment Penetrations 107 to 110 Descripuon: jn the process of reviewing the followir$g documents, (i) Containment Recirculation Spray System (RSS) Stress Data Package, Calc. No. SDP-RSS-01361M3, Rev. 4 Dated 5/29/97 (W) Piping and Instrumentation Diagram, Low Pressure Safety injection / Containment Recirculation, Drawing No.12179-EM-112C-16 Rev.16 (iii) FSAR Section 3.8.1.1.4, Steel Liner and Penetrations (iv) Design Criteria for Containment Liner Penetratio'is, NETM-54, Issued May 1984 (v) Calculation No.12179-NS(B)-120 Rev. 2, CCN #9, ' Class 2 Unsleeved Penetrations' we noted the following discrepancy:
Background:
Based on the stress data package (i), under operating condition 7, the operating process temperature for lines 3-RSS-010-5-2 and 3-RSS-010-10-2 is 257 deg F. The corresponding pressure in "'ese lines is 150 psig. This is an Emergency & Faulted conualon which is described as follows ' Containment Recirculation Pumps take suction from the Containment Recirculation Sump and discharge to the spray headers. A failure of one train of service water cooling to the Containment Recire Coolers 3RSS*E1 A& C results in the affected RSS train (E1 A, C) discharging hot sump water (257 deg F) to the ring headers and the unaffected RSS train (E1B, D) discharging moled sump water to the headers'.
Since a failure of either train of service water (A or G) needs to i
be considered, the same operating condition of 257 deg F, and 150 psig needs to be considered for lines 3 RGS-010-2f-2 and 3-RSS-010-9-2.
The P&lD (ii) shows that the four RSS lines penetrate the containment throt:gh Unsleeved penetrations marked 107 108, 109,and 110.
Based on the applicable section of the FSAR (iii), Unsleeved penetrations consist of piping installed through the containment wall that is thermally cold, and the process pipe is welded directly to the reinforcement plate.
Anod nn the dodnn crih rin inr enntninment finer nonotrntinns Printed 12/11/9710 23.50 AM Page 1 of 4
Northeast Utilitiec ICAVP DR No, DR MP3 0076 Millstone Unit 3 Discreparicy Report (iv), Unsleeved penetrations are used for thermally cold systems, where the operating temperature inside the process pipe is 200 deg F or less. Sleeved penetrations ar3 used for all thermally hot systems, where the operating temperature inside the penetration l
is more than 200 deg F.
Discrepancy:
The operating process temperature inside Unsleeved penetrations 107,108,109 and 110 under one of the Emergency and Faulted conditions is 257 deg F. This exceeds the design c.'*cMa allowable temperature of 200 deg F for Unsleeved pe.wrations.
Larger thermal expansion induced loads due to the higher pipe-penetration assembly temperature have not been addressed in the penetration qualification calculation (v).
This discrepancy is classified as NRC Significance Level 3 because this condition may place the containment penetration outside the design basis.
Review Valid invalid Needed Date Initiator: Prakash, A.
9 O
O 8257 VT Lead: Neri. Anthony A O
O O
62$S7 VT Mgr: schopfer. Don K G
O O
s/29.S7 IRC Chmn: singh. Anand K O
O O
8*S7 Date:
IW Allo:
Date: 11/21/97 RESOLUTION: Response ID: M3-IRF-00361 Disposition:
NU has concluded that Discrepancy Report DR-MP3-0076 does not represent E iscrepant condition.
The identified discrepancy is incorrect with regard to the design basis reference for containment penetration temperature criteria.
Penetrations 107,108,109 and 110 are unsleeved penetrations for the RSS supply to the containment spray headers, RSS lines 3-RSS-010-10-2 and 3 RSS-010-5-2 have operating conditions as high as 257'F due a postulated single failure of cooling to the RSS heat exchangers subsequent to a LOCA event, which exceeds th6 fong term design basis of 200'F for unsleeved penetrations. The basis for the 200 'F is provided in NETM-54 which is a referenced design input to the suoject calculation and states that 200*F temperature is the maximum design temperature for normal operation or long term pericds. The temperature limit of 200'F is necessary to ensure long term integrity of the adjacent concrete containment. Sustained temperatures above 200'F could result in a localized loss of concrete strength over an elongated period of time (i.e. a matter Printed 12/11/97 to23.s4 AM Page 2 of 4
l l
Northeast Utilities ICAVP DR N. DR-MP3-0076 Millstone Unit 3 Discrepancy Report of days to weeks). NETM-54 shows up to 350'F for accident conditions or shor; durations. The duration of the temperature excursion above 200*F in these lines is less than two hours and therefore is considered not to adversely impact the containment concrete or the containment penetration qualification. This conclusion is consistent with the guidance provided in ACI 34.1 and ASME Section ill Division 2 Subsubarticle CC-3440.
Therefore, the penetration qualification calculation is consistent with design triteria provided in NETM 54.
The elevated thermalloads applied to the penetration assembly by the attached piping have been evaluated in the referenced penetration calculation. Significance level criteria do not apply here as this is not a discrepant condition.
==
Conclusion:==
NU has concludea that Discrepancy Report DR-MP3-0076 does not represent a discrepant condition. The identified discrepancy is incorrect with regard to the design basis reference for contanme it penetration temperature criteria. The referenced value is for normal operation, while NETM-54 allows up tc 350'F during accident conditions. Significance level criteria do not apply as this is not a discrepant condition.
Previously identifled by NU? O ves T.Mo Non oiscrepent Condition?Q vos @ No Resolution Pending?O ve.
W No Resolution Unresolved?O ve.
@ No Review Initiator: Prakash, A.
VT Lead: Neri, Antheny A VT Mgr: schopfer, con K IRc Clwnn: Singh, Anand K oate:
11/12/97 SL comments: We acknowledge and accept your disposition response related to the temperature limit of 200*F for the adjacent concrete containment, which is necessary to ensure long term integnty of the concrete. We also acknowledge and accept your disposition response that elevated thermal loads appMed to the penetration assembly by the attached piping have been evaluated in the referenced penetration calculation. However the DR was not wntten to address either of these issues.-
The unresolved issue is that the penetration pipe is welded on both sides of the 4*-6" containment wall. On the inside, the pipe is welded to a 1" thick collar plate, which is welded to the containment liner, and on the outside, the pipe is welded to a 1" thick embedded plate. Under the postulated condition,257'F sump water will pass thru the penetration pipe. Since the penetration pipe is anchored on both sides of the containment wall, thermal expansion is restrained. The resulting f;rces will be transferred thru the pipe / collar plate and pipe / embedded plate connections to the concrete wall. These forces will be applied to the penetration assembly in addition to the loads applied by the attached piping, The referenced penetration calculations do not Printed 12/11/971023.56 AM Pape 3 of 4
t I
' Northe:st Utilities ICAVP DR No. DR MP34076 Millstone Unit 3
' Discrepancy Report address this combined load condition.
f t
b PrteWed 12/11,971073.58 AM p,9,4 or 4
~
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