ML20012A563
| ML20012A563 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 02/23/1990 |
| From: | Withers B WOLF CREEK NUCLEAR OPERATING CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-88-004, IEB-88-4, WM-90-0013, WM-90-13, NUDOCS 9003120223 | |
| Download: ML20012A563 (23) | |
Text
_ . _
1 y,o W$LF CREEK NUCLEAR OPERATING CORPORATION UY ow asseuse ommer February 23, 1990 WM 90-0013 U. S. Nuclear Regulatory Comunission ATTN: Document Control Desk Mail Station P1-137 Washington, D. C. 20555
Reference:
1). Letter dated July 8, 1988 from B. D. Withers WCNOC, to Document Control Desk NRC-
- 2) Letter dated September 29, 1988 from B. D. Withers, WCNOC, to Document Control Desk, NRC Subjects- Docket No. 50-482: Updated Response to NRC Bulletin 88-04 Gentlemen The purpose'of this letter is to provide an updated response to NRC Bulletin 88 ' Potential Safety Related Pump Loss'. Reference 1 transmitted the results of the study performed at Wolf Creek Generating Station (WCGS) for safsty-related pumps except_ for the pumps supplied by Ingersoll-Rand.
Reference 2 transmitted the-information on the Ingersoll-Rand pumps. The attachments to. this letter provide the total pump study and revises information previously- provided' on the Safety Injection Pumps and
-Centrifugal Charging Pumps. The information being revised was inadvertently.
transposed by the vendor.
attachments have been completed.
_ The actions to be taken identified in the If you have any questions concerning this matter, please contact me or Mr. H. K. Chernoff of my staff.
Very truly yours, i:
Bart D. Withers President and g-Chief Executive Officer BDW/aem Attachments 1
cci E. J. Holler (NRC), w/a R. D. Martin (NRC), w/a D. V. Pickett (NRC), w/a M. E. Skow (NRC), w/a P.O. Best 411/ Dwimpton KS es43s / Phone: (316) 3644:31
, 9003120223 900223 k l PDR ADOCK 05000482 g l {I8 L o PDC O
- f. , . ;
. 1 i .. l I
i ! I l ! STATE OF EANSAS )
) ss ,
COUNTY OF COFFEY ) ') l 1 Bart D. Withers, of lawful age, being first duly sworn upon oath says that- ! he is President and Chief Executive Officer of Wolf Creek Auclear Operating l corporations. that he has read the foregoing document and knows the content 1 thereof 'that he has executed that same for and on behalf of said j Corporation with full power and authority to do so and that the facts l therein stated are true and correct to the best of his knowledge.- ! information and belief, j i By ' : _2 Bart D. Withers -1 President and .j Chief Executive Officer j SUBSCRIBED and sworn to before me this M 3 day of d'2:r^^1990. 1H& Al~rk Notary Public 1 Il 5 i l' l: Expiration Date W/((d , s y .
- k. J
'l J
( . l *
, . . Attcchment I to WM 90-0013 l
~
Pago I cf 3 i I UPDATED RESPONSE TO NRC BULI.ETIN 88-04 POTENTIAL SAFETY-RELATED PUMP LOSS
- 1. Introduction On May 5, 1988, the Nuclear Regulatory Commission (NRC) issued Bulletin 88-04,
' Potential Safety-Related Pump Loss'. The purpose of the bulletin was to request all holders of operating licenses or construction permits for nuclear power reactors to investigate and correct, as applicable, two mini-flow '
design concerns. The first concern involves a potential for the dead-heading of one or more pumps in safety-related systems.that have a miniflow line common to two or more pumps or other piping configurations that do not preclude pump to-pump interaction during mini-flow operation. The second concern is whether or not the installed miniflow capacity is adequate for even a single pump in operation. ! Thic response is being submitted to comply with action itcm 4 of Bulletin 88-04 which requested that licensees provide a written response thats a) summarizes the problems and the systems affected, t i b) identifies the short-term and long-term modifications to plant operating ' procedures or hardware that have been or are being implemented to ensure safe plant operations, i 4 c) identifies an appropriate schedule for long-term resolution of this and/or other significant problems that are identified as a result of this bulletin, and d) provides justification for continued operation. II. Summary of Pump Evaluation a) Summarize the problems and the systems affected. An engineering study of safety systems sitowed that no safety related pumps at Wolf Creek Generating Station (WCGS) have the potential for being dead-headed by running in parallel on miniflow with a stronger
- pump. Details of that study are given in Attachment II.
An engineering study was initiated to determine the problems and systems affected by low flow hydraulic instabilities. All pump manufacturers and the Nuclear Steam Supply System (NSSS) Vendor were contacted to provide information in regards to this concern. The responses indicate that no design changes are required and no pump performance degradation is anticipated due to low flow hydraulic instabilities if vendor operating recommendations are applied. The results of this study are given in Attachment II. b) Identify the short-term and long-term modifications to plant operating procedures or hardware that have been or are being implemented to ensure safe plant operations.
~
r: l' * .
? * '.
s Att:chment I to WH 90 0013 . P;go 2 cf 3 t
)
i Cenerally, three items have been preliminarily identified for ! action. The affected Vendor Technical Manuals will be revised to
; reflect the new information. Applicable operations procedures will j be revised to reflect any new information. Training will l incorporate the subject of low flow hydraulic instability in the -
licensed operator training program. No hardware changes are anticipated. 1 Certain plant conditions warrant allowing a safety related pump to . operate at a flow-below that recommended for continuous operation. ! 6 Off Normal and Emergency procedures address upset plant conditions ; which, in general; are higher priority concerns than pump hydraulic instability. These procedures will not be revised to include i precautions concerning low flow operations. A precaution may lead [ to confusion on the part of the operator, which could negatively ; i affect _ plant safety. Other plant conditions which may require running pumps .at .a flow below that recommended for continuous l operation are half pipe operation in shutdown cooling and draining ; the refueling pool during a . refueling outage. For similar reasons > as above, precautions will not be-placed in procedures which address this type of plant condition. . More specific recommendations for action are included in Attachment I II. As further information becomes available, it will be reviewed . for applicable action items, c) Identify an appropriate schedule for long-term resolution of this L and/or' other significant problems that are identified as a result of this bulletin. . Precautions h' ave already been p1 heed in some Emergency Core Cooling System operating procedures. It is anticipated that the long term training, technical manual'and operating procedure changes will be completed by April 1, 1989. d) -Provide justification for continued oporation particularly with regard to General Design Criterion 35 of Appendix A to Title 10 of the Code of Federal Regulations (10CFR50), ' Emergency Core Cooling' and 10CFR$0.46,
" Acceptance Criteria for Emergency Core Cooling Systems for Light Water Nuclear Power Reactors."
Volf Creek Nuclear Operating Corporation (WCNOC) has developed a pump and valve operability program as required by 10CFR50.55a(g). The program meets the requirements of ASME Boiler and Pressure Vessel Code, Section XI and applicable Addenda. It is required operationally by Paragraph 4.0.5 of the WCGS Technical Specifications. A copy of the WCGS pump and valve operability test program summary is given in ' Attachment III. This program has been set up to detect any degradation in pump performance before the pump is incapable of performing its safety function. Based on discussions with pump manufacturers, internal recirculation caused by low flow does not result in catastrophic pump f ailure, but rather in long-term degradation. The WCHOC pump and valve testing program provides suf ficient assurance that safety-related pumps can perform their safety functions and that Wolf Creek's safety-related ; i
l .
\
, ' .. Attcchm:nt I to WM 90-0013 ;
P g? 3 of 3 i systems are ready to operate as designed. Any single failure would l not prohibit the safety function from being accomplished. ! I III. Conclusion In conclusion WCNOC studies show that no safety-related pumps at WCGS have the potential for being dead. headed by running in parallel on mini-flow with ' a stronger pump. Information concerning low flow hydraulic . instability F indicates that some changes to technical manuals. operating procedures and operator training on the subject are necessary. Continued operation of WCGS is justified by the ASME Boiler and Pressure Vessel Code Section XI pump and i valve operability program currently in place at WCGS, which will detect any degradation of pump performance, regardless of cause. r i 9
+
a 11
*l . Att:chment II t3 WM 90-0013 l~ P;ga 'l cf 15 ATTACHMENT II INDIVIDUAL PUMP LOW FLOW STUDY
- 1. Essential Service Water (ESW)(2 pumps)
Manufacturer Byron Jackson Concern Number 1: Dead-Headinc on Minimum Flow ODeration The ESW pumps have no minimum flow lines installed. Whenever they are run, they flow through the main cooling header. All automatic initiations of the pumps also line up the system such that the pumps always flow through the main system. Thus, this concern is not a problem at WCGS for-these pumps. Copcern Number 2: Low Flow Hydraulic Instability Communication with the pump nanufacturer verified that the original required minimum flow of 8100 gpm, as specified in Vendor Manual M-089 K029, ic sufficient for continuous operation. Sttps 4.1.6 and 4.2.6'of Procedute SYG2EF-200 call for verifAcation of flow greater than 0.100 gpm "e when starting a pump. Step 5.1.10 of STS-EF-100 A&E requires a flow greater than 13,300 gpm for the surveillance test. Actions To Be Taken 6 Nont
7 _. 4 Att:chment II t3 WM 90-0013- ), P:ge 2 Of 15 i f
- 2. Fuel Pool Cooling Pumps (2 pumps) t Manufacturer: Gould Pumps. Inc.
Concern Humber 1: Dead-headinn on Minimum Flow Operation The Fuel Pool Cooling Pumps have no minimum flow lines installed. I Whenever they are run, they flow through the main cooling header. Thus, this concern le not a problem at WCGS for these pumps. , Concern Number 2: Low Flow Hydraulic Instability The. pump manufacturer has identified a flow of 1500 gpm as the lowest flow allowed for continuous operation. This is 500 gpm more than presently e identified in Vendor Manual H-084-052. Procedure SYS-EC-120 addresses only high flow and does not address low flow. Step 5.1.3.1 of procedure STS-EC-100 A L B requires a flow of greater than 750,000 lbm/hr (1560 gpm} upon' pump start. As.tioy1._Ips- Be Teken
- a. Add a step or a precaution in procedure StD-EC-120tomaintait[ flow .
for each pump Ereater than 1500 gpu (722,000 lbm/br)
- b. Change Vendor Manual H-084-052 to reflect the new minimum flow requirement.
- c. Changt control room flow indicator banding via T.P.S.D. (Total Plant Setpoint Document).
- d. Change low flow alarm via T.P.S.D.
i 1 6
Att:chment II to WM 90-0013
. P g? 3 cf 15 i.
l
- 3. Component Cooling Vater Pumps (4 pumps)
Hanufacturer: Gould Pumps. Inc. Concern Number 1: Dead-Headinc on Minimum Flow Operation I The Component Cooling Water Pumps have no minimum flow lines installed. Whenever they are run, they flow through the main cooling header. Thus, this concern is not a problem at WCGS for these pumps. Concern Number 2: Low Flow Urdraulic Instability i f The pump manufacturer has identified a flow of 3000 gpm as the lowest flow ; allowed for continuous operation. This is 250 gpm more than presently i identified in Vendor Manual H-082-039. Steps 5.1.4 and 5.2.4 of surveillance procedures STS-EG-100 A & B require a flow of greater than 2.8 ,x 106 lbm/hr (5800 gpm) for pump cperation. No mention of proper minimum pump flow is made in procedure SYS-EG-120. Actionr To De Ygken
- n. Add a ster or a precantion to procedurc SYS-EG-120 to verify a flow of r greater titan 3000 gpm (3.5 x 106 ihm/hr; for each runnicg pump. '
- b. Change Vendor Manual H-082-039 to reflect the n 7w minimum flow i requirement. '
- c. Chango low flow alarm via 7.S.P.D.
3 V l l
'AttCchment II t3 WM 90-0013 i
P g) 4 cf 15 j.
I
- 4. -Motor Driven Auxiliary Feedwater Pumps (2 pumps)
Manufacturer: Ingersoll-Rand Concern Number 1: Desd-Headina on Minimum Flow Operation
?
The motor driven auxiliary feedwater pumps share a common return header for their minimum flow with the turbine driven auxiliary feed pump. A e pressure breakdowr. orifice is installed on the individual pump mini-flow # lines before they join the common header. Per drawing H01AL01, .the f orifices break pressure down from about 1500 psia to less'than 150 psia' and are designed for operation with all three auxiliary feed pumps on minimum flow.- Westinghouse has stated that placement of.an orifice in the individual miniflow lines desensitises the system to the strong / weak pump interaction. Thus, this concern is not a problem at WCGS for these pumps. Concern Number 2: Low Flow Hydraulic Instabillgy, The pump manufacturer has determined that the Motor Driven Auxiliary- ' Feedwater Pump may be operated up to one hour per month at a minimum flow i of 75 gpm with no short term damage. This minimum flow rate correuponds to the presently installed edntmam flow capacity. . Act ions Io Bo Taken
- a. Add precautions la Procedures STS-AL-101 and 102 to limit any single run of the motor driven auxiliary feedwater pump to one hour minimum flow. ,
a
- b. Revise the Vender Manual to indicate the time limit on minimum flow operation. '
P i 1 I I
V: *
- r ., . Attcchment II to WM 90-0013 L P;ga $ cf 15 i
- 5. Turbine Driven Auxiliary Feedwater Pump (1 pump) -
Manufacturer: Ingersoll-Rand conecrn Number 1: Dead-Headine. on Minimum Flow Oneration The turbine driven auxiliary feedwater pump shares a common return header ; fcr ito minimum flow with the motor driven auxiliary feedwater pumps. A ; pressure breakdown orifice is installed on the miniflow line before it joins the common header. Per drawing H01AL01, the orifice breaks pressure down from about 1500 psia to less than ~150 psia and is designed for ' operation with all three auxiliary feedwater pumps on minimum flow. Westinghouse has stated that placement of an orifice in the individual , miniflow lines desensitiaec- the system to the strong / weak pump ! interaction. Thus, this concern is not a problem at WCGS for this pump. Concern Number 2: Low Plow Hydraulic Instab111tv l The pump manufacturer hss determined that the Turbine Driven Auxiliary . Feedwater Pur.p may be operated up to one hour per month at a minimum flow of 120 gpm with to short term damage. This minimum flow rate correspo. ids to the presently installed minimum flow capacit,w. bq1 tons 19 Ea Takerj. ;
- r. . Add a precaution in Procedures STS-AL-103 to limit any single run of the Turbine Driven Auxiliary Feedvater Pump to one hour on minimum flow. i
- b. Revise the Vendor Phnual to' indicate the time limit on minimum flow operation.
c Att;chment II to WM 90-0013 P;ga 6 cf 15 r
- 6. Containment Spray Pumps (2 pumps)
- Pump Hanufacturer: Ingersoll-Rand '
Concern Number 1: Dead-Hesdinc on Minimum Flow Operation The Containment Spray Pumps have no minimum flow lines installed. When i they are run, they always flow to the RWST or through the main spray header. Thus, this concern is not a problem at WCGS for these pumps. ! Concern Number 2: Low Flow Hydraulic Instability ; The pump manufacturer has determined that the Containment Spray Pumps may be operated up to one hour per month at a minimum flow of 150 gpm. As stated under Concern No. 1, these pumps have no minimum flow lines. The i flow orifice installed in the pump discharge line' to the RWST is sized for 300 gpm. Results of the. pump surveillance tests show that flow thru this -, l lineis normally slightly more than 300 gpm. In addition, the spray eddition eductor .le always valved in service, adding approximately 75 gpm to pump flow. Therefore, the containment spray pump is never operated at less !.ba t 375 gpm' flow. Since 150 gpm is the minimum flow specified ! originally in the Vendor Technical Manual, no actions need to be taken. - This concern is not.a problem at WCGS for this pump. 6stione To Be_13 hen 4 None 1 ! v s t I
r'l ', , p o -
? .' !
s l Attachment Il to WM 90-0013 Page 7 of 15 L l
- 7. Centrifugal Charging Pump (2 pumps)
Manufacturer Pacific Pumps ' j Concern Number 1: Dead Headina on Minimum Flow Oneration q The centrifugal charging pumps share a common return header for their minimum flow. Pressure breakdown orifices are installed in the
" individual pump miniflow lines before they join the common header. Per drawing M01BG03, the orifices break pressure down from greater than 2400 ;
psia to less than 150 psia. Westinghouse has stated that placement of ' an orifice in the individual miniflow lines desensitiaes the system to : the strong / weak oump interaction. Thus, this concern is not a problem ! at WCGS for these pumps. ; Concern Number 2: Lov., flow Hydraulic Instability,
, The pump manufacturer has identified a flee of 175 gpe: as- the lowest e flev anowed for cottinuous operation. Thiv is 115 gpm more than j pr.*sentiv identified it. Vendor Ihnual M-721093. Tha pump manufacturar {
i has also indicated that the centrifagal charging pumps may be run en the l p present minimum flow of 60 Epm i'or a period of time not to exceed 30 ; minutes with no noticeablo degradation of pump performance. Surveillance Procedures STS-BG-100 A & B are wn quarterly. During the , m performance of thm terts the pumps a';e not run on minimum f1w. alone, bT; due to the variouo valve line-ups required, pump f1w could be ; throttled below the 175 gpm required for continuous operation. This l condition exists for only about 15 minutes ara therefore. meets the l recommendations of the pump manufacturer. . Procedures SYS-BG-120 and SYS-BG-201 do not address running the , centrifugal charging pumps at a flow less than 175 gpm. When the l : centrifugal charging pump is running in the charging mode, the minimum flow valves are always open, passing 60 gpm. The minimum flow valves only close upon a Safety Injection signal. 5 Actions To Be Taken
- a. Place a precaution in STS-BG-100 A & B to keep the running time of the centrifugal charging pump less than 30 minutes when the flow is less than 175 gpm.
4
- b. Place a- precaution in SYS-BG-120 and SYS-BG-201 to keep charging flow above 70 gpm when a centrifugal charging pump is running. ,
- c. Revise Vendor Manual M-721-093 to include the new minimum flow ,
requirements.
- d. Change low flow alarm via T.P.S.D.
b a e. Revise alarm response procedures ALR-580 and'ALR-42A. '
, - - e-, -..
i . AttCchme t 11 t) WM 90 0013 l
- Page 8 of 15 j i
l' L 8. Safety Injection Pumps (2 pumps) I Manufacturer: Pacific Pumps Spneern Number 1: Dead-Headina on Minimum Flow Operation j
, The Safety Injection Pumps share a common return header for their minimum flow. Pressure breakdown orifices are installed in the l individual pump miniflow lines. Per drawing M01EH01._the orifice breaks i pressure-down from greater than 1200 psia to less than 50 psia.
Westinghouse has stated that placement of an orifice in the individual l miniflow lines desensitimes the system to the strong / weak pump l interaction. This concern'is not a problem at WCGS for these pumps. l. Concern Number 2: Low Flow Hydraulic Instability The pump manufacturer has identified a flow of 130 gpm as the lowest 1 flow allowed for continuous operation. This is 85 gpm more than 1 presently identified in Vendor Manual H-721-096. The pump manufacturer J has siso indicated that the safety injection pump may be run on the I present minimum flow of 65 gpgi for a period of time not to exceed 30 I minut.ss with no noticeable degradation of pump performance. Surveillance procedures STS-EM 100 A & B are run quarterly. During this I surveillance test the pumps are run on with a minimum flow of 45 gpm. This condition exists for only about 15 minutes and therefore meets the -; recommendations of the pump manufacturer. ; Actions To Be_Ilkyn
- a. Place a precaution or step in surveillance procedures STS-EM-100 A & ,
B to limit the time on minimum flow to 30 minutes. > c
- b. Revise Vendor Manual H-721-096 to include new minimum flow ,
requirements. f 0 1
, . 1 I '
Att:chment Il to WM 90-0013
, *4 i'
Pag] 9 c f 15 1 l
- 9. Residual lleat Removal Pumps (2 pumps)
I i Manufacturers Pacific Pumps I Concern Number 1: Dead-licadine on Minimum Flow Operation The Residual llent Removal (RER) pumps each have their own individual j' minimum flow lines which return to the pump suction and do not interface " with each other. Thus, this concern is not a problem at WCGS for these ' pumps. Concern Number 2: Low Flow !!vdraulic Instability The pump manufacturer has identified a flow of 1700 gpm as the lowest flow allowed for continuous operation. This is 1200 gpm more than presently , identified in Vendor Manual M-721-099. The pump manufacturer has also indicated that the Rl!R pumps may be run on the present minimum flow of 500 gpm 'for a period of time not to exceed 2.25 hours with no noticeable degradation of pump performance. Surveillance procedures STS-EJ-100 A & B are run quarterly. During this ' surveillance test the pumps are run with a minimum flow of 500 gpm. This . condition exlets for only about 15 minutes etc therefore veets the l reccamendations of the pump moufacturer. i
.Pu cedureo SYS-EJ-110, SYSe2J-120. and SYS-Pj-321 eall fer the Rl!R pnmps to be operated at different conditions. At times, pump flows could be
)ese than 1700 g;m, such ss during preparation for shutduwn cooling i O operation.
he}ienr. To Be Tcken l
- a. Place a precaution or step in procedo'es STS-EJ-100 A & B, SYS- EJ i10 SYS-EJ-120, and SYS EJ-321 to limit one time operating on minimum ilow -
to 2.25 hours.
- b. Revise Vendor Manual M-721-099 to include new minimum flow requirements. ,
- c. Place a precaution in Procedure FitP-02-001 that low flow cavitation concerns. chould not be the over-riding concern. An attempt should be made to limit the running time at flow less than 1700 gpm to less than 2.25 hours,
- d. Change control room flow indicator banding via T.P.S.D.
Ll l
. Att:chmelt II t:9 WH 90 0013 i - P g] 10 cf 15 ?
L,
'10. Borjc Acid Transfer Pumps (2 pumps) i-i Pump Manufacturer: Crane Chempump Concern Number 1: Dead-Headint on Minimum Flow Ooeration i
Each Boric Acid Transfer Pump has its own individual minimum flow line. No interface exists. Thus, this concern is not a problem at VCGS for these pumps. Concern Number 2: 1,0w Flow Hydraulic Instability The pump manufacturer has indicated that, due to the low suction specific speed for these pumps, low flow cavitation is not a concern. Actions To Be Taken None r w h l O
V. e * " . Att:chme~ t II t3 W190-0013 Page 11 cf 15 i
- 11. Fuel Oil Transfer Pumps (2 pumps)
Pump Manufacturer Crane Chempump Concern Number 1: Dea d.Ilea d inP. on Minimum Flow Operation
-The Fuel 011 Transfer Pumps have no minimum flow lines installed. When they operate they always flow through the main header. Thus this concern is not a problem at WCGS for these pumps.
I Concern Number 2: Low Flow flydraulic Instability The pump manufacturer has indicated that, due to the low suction specific speed for these pumps. 10w flow cavitation is not a concern. Actions To Be Taken None i i t i a i r s N 4 l j l l
f ,
, , Att;chment 11 to WM 90 0013 ; ; P go 12 cf 15 .;
s..
- 12. Jacket Water Keep Warm Pumps (2 pumps) j Pump Manufseturer Goulds Pumps. Inc. ,
Pump Supplier Colt Industries (Fairbanks Horse) ; Conecrn Number 1: Desd-Headine on Minimum Flow Operation l The Jacket Water Keep Warm Pumps have no minimum flow lines installed. When the pump runs, it flows through the main header. Logic circuitry will automatically stop this pump when the engine driven jacket _ vater cooling pump is running. Thus, this concern is not a problem at WCGS for ' these pumps. l
' concern Number 2: Low Flow Hydraulic Instability a
colt Industries has indicated that low flow instabilities are not a ' concern for these pumps since they are never throttled nor deadheaded.
- When they run, they always provide nearly rated flow, based on system design.
Actions To Be TE(gg l None 5 i f
}
t E
if
- c. . '
L .
'Att:chment'II to WM 90-0013 P:g3 13 cf 15
- 13. Diesel Intercooler Pump (2 pumps)
Pump Manufacturer: Pegson ! Pump Supplier Colt Industries (Fairbanks-Morse) . Concern Number 1: Dead-Headine, on Minimum Flow Operation The diesel intercooler pumps have no minimum flow lines installed. They are engine driven and operate only when the diesel engine is running. When running they always flow through the main header. Thus, this concern is not a problem at WCGS for these pumps. Concern Humber 2: Low Flow Hydraulic Instability ' Colt Industries has indicated that low flow instability is not a concern for these pumps since they will never be throttled nor deadheaded. No valves exist in the system which could be used to throttle flow below nearly design flow. Actions To Be Taken None b P i i e
l l
' *
- Att:chment II to WM 90-0013 P:go 14 cf 15 r-
- 14. Jacket Water Cooling Pumps (2 pumps) r Pump Manufacturer: Pegson Pump Suppliers Colt Industries (Fairbanks Horse)
Concern Number 1: Dead-Headint on Minimum Flow Operation the Jacket Water Cooling Pumps have no minimum flow lines installed. They are engine driven and operate only when the diesel engine is running. . When running they always flow trarough the main header. Thus. .
- this concern is not a problem at WCGS for these pumps. .
Concern Number 2: Low Flow Hydraulle Instability l Colt Industries has indicated that low flow instability is not a problem
- h for these pumps since they will never be throttled nor deadheaded. No valves exist in the system which could be used to throttle flow below nearly design flow.
Actions To Be Taken Mone ?
tus:# e1 .1
-. . 1*
j
' ' ' a p' . LAtt:chment II to WM 90 0013
=
i
, P .g? 15 cf 15 j
15.. Boron Injection Tank Recirculation Pumps (2 pumps) ; I
-Pump Manufacturer Crane Chempump Concern Number 1: Dead-Headine on Minimum Flow Operation. I These' pumps are never used. They are always tagged out of service during 1 all modes of - plant operation. This. concern is addressed only in the- !
remote chance these pumps ever become necessary. ; L I The BIT Recirculation Pumps have no minimum flow lines installed. When j they. operate, they' always flow- through the main header. Thus, this l g concern is not a problem at WCGS.for these pumps. , i Conce'rn Number 2: Low Flow Hydraulic Instability t 'The pump manufacturer has indicated that due to the low suction specific l speed- for these pumps. Low Flow Cavitation is not a concern. i
, Actions To Be Taken I None '
i i j it j L ! t g o
. 'h
'h t
I s E e r i .
m :n - . i- 9 y w+,,> - j f f? V.
- O Att:ctunent-III ts 24 90 0013-c; m - :l
- y;g7
-1 cg - 3. >
'l I.i F. '
s
, I; 1' .. .j
. ATTACIOG387 III ^
t Inservice Testing Program for Pumps
~
i y
%l)
-Excerpt from -
b <!l Inservice Testing of'Pweps and Valves
.t WCNOC Document WCOP-02 5j 3
-,-i
!.. ; w. s 5
J/ , ; i.1 ; V - l
- i. . :n
' f Ir
( I i r '
~l 1
e - b y '.j' y t ( '.. M < g a '.I t
=+
i i 1 ) . ? ~$
-: I
't l .t fy,p: .
w .
' k. , g
.- g 4
r )
?
?
; t, .-
e
.e ,
0e 1, 1;'
'i i
. .g ; f 3
..t y?. !
F
^
.[
ia , t ;
.g .>
l t; , ; i
<a N
- 1 ,t-r -'%,r--p.
,,,y,,..,9.,_
.,,p.,y.a y-,,e--f ' mt --VM ma 4 M6 #- er e e Lee =r "vm-DM'-m 47-tv 't- ==4-"wFr."=eeev' T N-d'ma'=Fw'f"ur FN=8t' *T-*'wi' F't* 'r'
+'tM'YF*T"'"',
J' - ' l,. m . Attachment'III t3 WM 90 0013 P:g] L 2 cf 3 l 2.0 INSIGIVICE TPSTING PROGRAM FOR PUMPS i 2.1 Genera 1 In formation 2.1.1 Applicabic Code ; L This testin, pogram for ISI Class 1, 2 and 3 Pumps meeta the requirements of Subsection IWP of Section XI of the ASME Doller and Pressure Vessdl Code, 1980 t Edition through the Winter of 1981 Addenda. Where these requirements are determined to be impractical, ' specific requests for relief have been written and included in Section 2.2. 2.1.2 Pump Program Tables The tables in Appendix A list all pumps included in the Wolf Creek Generating Station (WCGS) IST Program. Data , contained in these tables identifies those pumps !
- . subject to Inservice Testing, the Inservice Test ,
quantities to be measured, the Inservice Testing Frequency, and any applicable remarks. The column headings are listed and explained below: I t PUMP TDENTIFICATION I PUMP NUMBlut: The Pump Identification Number, SYsTPM: . The System of which the pump is s a Component. JST CLASS: The ISIs Classification of the pump. P& TD NUMU5Ut: The WCGS Drawing Number for the Pt.ID referzing to the pump. , P&ID COORDr, The drawing coordinate location of the , pump on the P&ID. -
- Jpr REOUIREMENTS PUMP SPEED. INLET (SUCT/ON) PR':SSilRE , DI FFER DJTI AL PRESSURE, FLOW RATE, VIBRATION, BEARING TEMPER > JURE AND LUBRICANT LINEI, OR PRESSURE: When the word 'YES*
appears in a particular test quantity column, that ' quantity will be measured or observed during Inservice Testing in accordance with Subsection IWP. If a modified test is planned or a test.is being waived, a request for Relief Number will appear in the test quantity column referencing the pump Relief Request. Requests for relief are identified as PR-x, where x is the sequentia1 number of the relief. The requests for relief are included in Section 2.7. Rev. 7 ' P, ige 4 of 1 (, ')
- o
1 i Att chrhent III t+> WM 90 0013 3 P:g3 3 cf 3 ' f 2.1.3: Measurement of Test Quantities i SPEED: Per IWP-4400, shaf t speed need not be measured L for pumps directly coupled to synchronous or induction ! type motor drivers. For variabic speed pumps, the pump
.(
l speed is set at the reference speed per IWP-3100. INI.ET (SOCTIpN) PRESstmEr For submerged pumps, inlet pressure will be calculated (using appropriate . i correction factors) from a measured tank or basin ' l 1evel. All other-inlet pressure measurements will be - taken using pressure instruments at or near the pump inlet. f. l_ DIFFERENTIAL PRESSURE: Differential pressure will be i calculated from inlet and discharge pressure > measurements or by direct differential pressure ; measurement. j PIDW RATE: ' Plow Rate will be measured using a Rate or Auantity Heter installed in the Pump Test Circuit. : a VIHRATION: Pump vibration will be measured wlth one of tho instruments referenced in IWP-4520.
' REARING TEMPERATURE: Pump bearing temperature (s) will not be measured. (Rel'ief Request PR-1).
LunRICANT LEVEL _OR PRESS [mH: Pump lubricant level or pressure wi,ll be observed during each inservice test y when applicable. 2.1.4 Allowable Ranges ol Test Quantitles The allowable ranges specified in Table IWP-3100-2 will be used for differential pressure, flow and vibration m%surements with the following exceptions. The Accept.tblu Range (on the bigh side) for differential pressure (DP) and flow (0) shall be 1.05 times the Ieference value.. The Alert Range (!!igh Values) shall L be >1.05 times the reference v.a'lue for difforential pressure and flow. Also for DP an:t a the Required Action Range (High values) will not be used. The aforementioned exceptions are applicable only ,to certain pumps (see Relief Request PR-11).. Should a measured test quantity f all outside the allowable range, corrective action per IWP-3230 shall be followed. 2.1.5 Instrument Accuracy Allowable i nstrument. accuracion are given in Table IWP-4110-1. If the accuracies of the station's instruments are not acceptable, tempora ry inst ruments j meeting those requirementn in Tahle IWP /.110-1 will be ; used. Hev, 7 l' age 's of 1M !}}