ML20094Q771
| ML20094Q771 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 08/09/1984 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Bishop T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| Shared Package | |
| ML20094Q775 | List: |
| References | |
| ANPP-30134-TDS, DER-83-61, NUDOCS 8408200322 | |
| Download: ML20094Q771 (40) | |
Text
{{#Wiki_filter:', 4 , f!ECEIVED flRC Arizona Public Service Company P o 80X 21C46 . PHOENIX, ARIZON A 85036
!1513 FH Z O f , August 9, 1984 flEGl0i4 V Kn ANPP-30134-TDS/TRB U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. T. W. Bishop, Director Division of Resident Reactor Projects and Engineering Programs
Subject:
Final Report - DER 83-61 A 50.55(e) Reportable Condition Relating to LPSI Pumps Failure To Start And Do Not Produce The Required Head. File: 84-019-026; D.4.33.2
Reference:
A) Telephone Conversation between P. Johnson and R. Tucker on September 14, 1983 B) ANPP-28001, dated October 13, 1983 (Interim Report) C) ANPP-28627, dated January 16, 1984 (Time Extension) D) ANPP-28883, dated February 15, 1984 (Time Extension) E) ANPP-29293, dated April 13, 1984 (Interim Report) F) ANPP-29841, dated June 27, 1984 (Time Extension)
Dear Sir:
Attached is our final written report of the Reportable Deficiency under 10CFR50.55(e), referenced above. Very truly yours, Elk %Alg E. E. Van Brunt, Jr. APS Vice President Nuclear Production ANPP Project Director EEVB/TRB:nj Attachments: CE Doc. No. CEN-285(V)-P Proprietary Copy #1 cc: See Page Two
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t l Mr. T. W. Bishop DER 83-61 Page Two CE Doc. No. CEN-285(V)-P Proprietary Copies 4 "cc: Richard DeYoung, Director #2 Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. .C. 20555 T. G. Woods, Jr. #3 D. B. Karner
- W. E. Ide.
- D. B. Fasnacht
- A. C. Rogers
- L'. A. Souza'
- D. E. Fowler
- T. D. Shriver #4 C. N. Russo
- J. D. Houchen
- J. R. Bynum
- J. M. Allen *
'J. A. Brand
- A. C. Gehr f5 W. J. Stubblefield #6 i W. G.' Bingham f7 R. L. Patterson #8
- R. W. Welcher #9 H. D. Foster #10 D. R. Hawkinson #11 L. E. Vorderbrueggen #12 7
R. P. Zimmerman #13 M. Woods
- T. J. Bloom
- D. N. Stover
- Records Center
- Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, GA 30339 Mr. E. Licitra #14 through 37 U. S. Nuclear Regulatory Commission Phillips-Building-7920 Norfolk Avenue i
Bethesda, MD ' 20814 I File: DER 83-61 #38
- Non-Proprietary Copy Attached 1
I
b i e i , FINAL REPORT - DER 83-61 DEFICIENCY EVALUATION 50.55(e) ARIZONA PUBLIC SERVICE COMPANY (APS) PVNGS UNIfS 1, 2, 3 I. Description of Deficiency The Low Pressure Safety Injection (LPSI) Pumps are supplied by Combustion Engineering (C-E) and are manufactured by Ingersoll-Rand (IR) and include 500 hp Westinghouse motors. They are identified by tag numbers as follows: 1MSIA-P01 2MSIA-P01 3MSIA-P01 1MSIB-P01 2MSIB-P01 3MSIB-P01 While performing preoperational testing at Unit 1 on March 18, 1983, LPSI pump DiSID-P01 was run for approximately three minutes with the pump suction valve 1PSIB-UV-652 closed. A restart of the pump was attempted approximately three hours later and the motor failed to start (i.e. , tripped out on the time overcurrent protection circuit which was set at 6 seconds). The pump was disassembled and inspection revealed surface damage (galling) to the pump lower case wear ring and mating surfaces of the impeller. Also, the lower case ring was angularly displaced approximately 3/4". This incident was the subject of DER 83-21. The corrective action was to repair the rough surfaces by smoothing with a stoning operation and replace the lower case ring set screws. The pump was then retested successfully. During the period of May 16 to May 19, 1983, two (2) more failures to start the same LPSI pump occurred due to motor time overcurrent trips. Disassembly and inspection revealed galling had occurred again on the lower case wear ring and impeller mating surfaces and the lower case ring was angularly displaced approximately 3/4". As before, the corrective action was to smooth the impeller and case ring by stoning. Subsequently, this DER (83-61) documented that on June 14, 1983, LPSI pump 1MS1B-P01 again failed to start during the continuation of the preoperational testing af ter running for approximately twenty minutes. At this point, the condition was attributed to a motor problem due to the fact that af ter each failed start, the pump was free to turn but was not coming to speed. Therefore, the LPSI Unit 1 motor was replaced with a Unit 3 LPSI pump motor. On June 19, 1983, the same LPSI pump with the Unit 3 motor failed to start af ter running successfully for two hours. On June 21, 1983, with the IR representative present, the pump was disassembled and inspected. Galling of the lower ring surfaces had occurred again and the lower case ring was angularly displaced approximately 3/4". Under the IR representative's direction, the pump was reworked to smooth all galled areas and reassembled. Ten successful test starts were recorded on June 26. On July 6,1983, the LPSI pump again failed to start.
y , .4' , Mr. T. W. Bishop ANPP-30134 Page Two on October 8, 1983, Unit'2 LPSI pump 2MSIA-P01 failed to start (6-second overcurrent trip) after <41 succcessful starts and accumulation of 66 hours of running time, reference NCR SM-3026. Disassembly revealed heavy galling at the lower impeller to case ring fit and the lower case ring was angularly displaced approximately 3/4", the same as observed after the Unit 1 pump failures to start. Miscellaneous
- 1. NCRs SM-2756 and SM-2757 are also included in this DER (83-61) to document that test data indicated pumps 1MSIA-P01 and 1MSIB-P01 did not meet performance requirements for head-capacity (Ref. CESSAR Table 6.3.2-1).
- 2. On December 3, 1983, the impeller from LPSI pump 3MSIA-P01 was -removed for installation in LPSI pump 1MSIB-P01 to replace the damaged Unit 1 impeller. During inspection of the Unit 3 impeller, it was noted that the bore was out of tolerance per vendor drawing C-8X20A3DX1A. The bore should be 2.5005"+.0005". The actual bore measurement is 2.5050" to 2.5015" (Ref. NCR SM-3418). All other LPSI pump impeller bores were within tolerance.
- 3. Inspection of running clearances on pump 1MSIB-P01 on January 24, 1984, after test runs to evaluate a preloaded j bottom bearing and modified running clearances with '
Nitronic 60 case rings, revealed light contact (Ref. NCR SM-3588). Equipment Description The LPSI pumps are 8 x 20 type WDF which are single-stage, centrifugal, vertical, overhung, end-suction type, close-coupled to Westinghouse frame 5010, vertical solid shaft (VSS) 500 hp, 1780 rpm 3/60/4000, squirrel cage induction motors. The Containment Spray (CS) pumps are IR d x 23 type WDF which have a 23" diameter impeller with matching diffuser (optimized for a different head-capacity range than the LPSI pumps) which fit into the same 8 x 20 WDF casing as the LPSI pumps. The motors are Westinghouse frame 5809, VSS, 800 hp, 1780 rpm, 3/60/4000, squirrel cage induction type, with the same upper and lower bearings, mounting fit to pump, and shaft extension dimensions as the LPSI pump motors. The CS pump / motor sets are supplied by C-E and are identified by tag numbers as follows:
s',; - t ,' - Mr. T. W.~ Bishop ANPP-30134 Page Three 1MSIA-P03 2MSIA-P03 3SMIA-P03 1MSIB-P03 2MSIB-P03 3SMIB-P03 Because of the design similarities between the LPSI and CS pumps, the corrective actions address both LPSI and CS pumps, even though CS pumps have never failed to start. II .- Analysis of ' Safety Implications The Low Pressure Safety Injection (LPSI) pumps are used to
. provide core cooling flow in a shutdown cooling mode and also to provide emergency core colling flow if there is a Loss of Cooling Accident (LOCA).
The Containment Spray (CS) pumps are designed to remove heat from the containment atmosphere in the event of a LOCA. They are also used to circulate reactor coolant to remove decay heat following plant shutdown. Based upon the above, the failure to start condition is evaluated as reportable under the requirements of 10 CFR Part 50.55(e) since, if left uncorrected, it could adversely affect the safety of plant operations. Also, this condition is evaluated as reportable under the requirements of 10CFR Part 21 since it constitutes a substantial safety hazard and, if left uncorrected, could adversely affect the capability to safely shutdown the reactor. III. Corrective Action The cause of the failure to start was theorized to be hard contact between the impeller and casing ring. Accordingly, based on the recommendation of Combustion Engineering and Ingersoll-Rand and with Bechtel Engineering concurrence, the following corrective actions were implemented on the LPSI and CS pumps for Units 1, 2, and 3 to mitigate the effects of the contact. Figure 1, attached, represents a generic cross-sectional view of the LPSI 8 x 20 and CS 8 x 23 WDF pumps and is provided to identify, by item number, the corrective action modifications.
- 1. The upper and lower K-500 Monel case wear rings (Item 6) were -replaced with new rings using Armco Nitronic 60 material which is known for its gall-resistant properties (Ref. 1). The Nitronic 60 is more gall-resistant than K-Monel.
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-ANPP-30134 Page'Four
- 2. (a) The running clearances between the impeller (Item 3) and casing rings (Item 6) on the LPSI pumps were increased to .029" .036". diametrical, (Ref. 2, Item 3). This was done to reduce startup contact forces and to further reduce startup friction.
(b) The running clearances between the impeller (Item 3) and the casing rings (Item 6) on the CS pumps were increased to .025" .032" diametrical (Ref. 3), for the same reason as 2(a).
- 3. The impeller (Item 3) upper and lower ring fit areas were serrated (grooved).to make them less sensitive to any contact and to minimize possible loss of pump head due to increasing the running clearances (Ref. 2, Item 4).
- 4. To assure centralization of the upper case wear ring, the allowable run-out on the male rabbet of the stuffing box extension (Item 264) was decreased from .005 inch to .002 inch TIR. Location fits will also be doweled to limit movement af ter alignment is achieved (Ref. 2, Item 2).
During testing of LPSI 1B (with its 500 hp motor and with above Items 1-4 implemented) another failure to start occurred on January 29,1984 (the unit was tripped manually after two seconds). As with previous failed starts, the shaft rotated slowly prior to the trip and was free to rotate by hand thereafter. Unlike previous failed starts, the unit was successfully restarted six times on January 30, 1984. Subsequent disassembly and inspection disclosed light contact , at the lower clearance, and the lower case ring was radially displaced approximately 1/4". III.B. Corrective Action, LPSI Pump Motors
- As documented and presented in detail in the C-E report (Ref. 9), it was concluded that due to the shaft flexibility in combination with transient electromagnetic starting forces, this particular 500 hp motor (frame 5010) is unsuited for reliable use with the WDF type pump, in spite of the mitigating effects of Corrective Action Items 1-4 above.
Contact between impe11ers and case rings during startup does not in itself cause failure to start, but has been demonstrated to be a precondition of the failure-to-start mechanism.
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.Mr. T.!W. Bishop ANPP-30134 Page'Five J
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Measurements of startup shaf t and. impeller deflections in air have.shown that impeller-to-case ring contact' consistently occurs with the original.500 hp LPSI pump motors and does not
. occur with the stiffer shaf t 800 hp CS . pump motors in combination with either LPSI or CS pump impe11ers, (Ref. 4).
. Therefore, to minimize the startup shaft and impeller
- deflections, the stiffer shaft 800 hp CS pump motor was installed on the LPSI pump.
It was determined that a 100 start test with no failures would demonstrate adequate reliability with 95% confidence for a pump / motor set (Ref. 5). The -following items were therefore implemented.
- 1. An 800 hp CS pump motor from Utit 3 was installed on the LPSI 1B pump (Ref. 6).
The pump / motor set was operated for 3 hours to stabilize bearing temperatures. It was then restarted 5 times (20 minutes run time for the first four starts to satisfy motor
, cooling requirements).- Subsequent disassembly and inspection on March 3, 1984, revealed light contact at the lower impeller clearance (360*) with corresponding contact at approximately 270* of the lower case ring on the side j away from the pump discharge connection.
- 2. The pump was reassembled and 100 additional starts were made. All runs were approximately 20 minutes duration and at 2000 to 2100 gpm valve setting. The first run (after refilling and venting) started at approximately 100 gpa through the minimum flow line, the same as in Paragraph 1 above. Subsequent disassembly and inspection (March 8,1984) disclosed no evidence of contact at the upper ring clearance and no obvious additional contact at the lower ring clearance, as noted in Item 1 above. The contact surfaces of the Nitronic 60 case rings were smooth with a light intermittent film transfer to the four
, impeller running surface lands. At a March 9, 1984 meeting, APS, Bechtel, C-E, and IR agreed that the light rubs were normal and within acceptable limits (Ref. 7). The significance of no evidence of contact on 90' of the lower case ring indicates startup deflections are not resulting in contact. The 270' contact resulted from the brief operation at minimum flow where pumps characteristically run rougher than at higher flows. It was further agreed that the test showed this particular 800 hp motor (frame 5809 with a 6" diameter L shaft between bearings) would operate reliably in combination.with the WDF type pump (either 8 x 20 or 8 x 23 sizes).
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- 3. All six LPSI pump motors fron' Units 1, 2, and 3 will be replaced by six new Westinghouse frame 5809 800 hp motors.
These new motors will be duplicates of and interchangeable with the original CS pump motors (Ref. 4). This motor replacement is proceeding in accordance with DCP 1, 2, 3 S M-SI-117. - The increased startup inrush current (800 vs 500 hp) is within the capacity of the diesel generators. The LPSI breaker settings were changed to accommodate the 800 hp motor. In addition, the original current transformer (100/5 amp.) was . replaced (150/5 amp.) and the ammeter was changed from a 0-100 to 0-150 scale meter.
- 4. SAR Change Notice 1180 has been initiated to revise affected sections of the FSAR for the change in LPSI pump motors.
- 5. As of August 8, 1984, Unit 1 LPSI pumps A and B have been started 36 times and 46 times, respectively, since
. completion of.the 100 start test, without any difficulties. Disassembly and inspection of these pumps during the time period of additional starts have not disclosed any abnormal wear patterns.
Also, CS pump A has been started 48 times and CS pump B, 46 times. Inspection after additional operation revealed no 1 abnormal wear patterns. These particular pump / motor sets have never had a failure-to-start problem. III .C . Corrective Action, Miscellaneous
- 1. Regarding NCRs SM-2756 and 2757, additional field performance tests after final modifications of both Unit 1 LPSI pumps have verified that the head-capacity I characteristics from minimum flow'to runout are acceptable.
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- 2. NCR SM-3418 was dispositioned to have the impeller returned to IR for rework to correct the bore dimension.
- 3. NCR SM-3588 was dispositioned to cleanup the impeller and replace the lower case ring after rubs had occurred while operating with a 500 hp motor on January 18, 1984.
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-ANPP-30134-Page Seven IV. References (1) V-CE-19299 dated Nov. 11, 1983 (2) V-CE-19218 dated Oct. 28, 1983 (3) V-CE-19298 dated Nov. 11, 1983 (4) V-CE-30175 dated Apr. 30, 1984.
(5) V-CE-20584 dated Jan. 26, 1984 (6) V-CE-19784 dated Feb. 20, 1984 (7) V-CE-21628 dated Mar. 9, 1984 (8) V-CE-21710 dated June.11, 1984 (9)- V-CE-30704 dated Aug. 2, 1984, Combustion Engineering Report CEN-285(V)-P, "Palo Verde Nuclear Generating Station Low Pressure Safety Injection Pumps Failure to Start" l
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i30sE' : Mr. G. C. Andognini ._._-Nb - Arizona Public Service Company ['- J P.O. Box 21666 - Sta. 4015 u Phoenix, Arizona 85036 ,; ""? , -Z
Subject:
Palo Verde LPSI and Containnent Spray (CS) Pumps O lito Dear Mr. Andognini .3.~. ... l Combustion Engineering has been asked to provide additional informa.ucn_on m .e MT W --l Nitronic 60 ruterial that C-E and 1-R are currently recommending fcY i die Me. LPSI and CS Pumps. This letter provides such technical informatier.A>m - ]- AJvn -l Anti-Galling Properties 5 (
- Nitronic 60 is formulated to be an anti-galling material. It contains 3.50 to "
4.507 Silicon which reduces galling tendeNy. Published galling resistance data by Armco and data from 1-R tests indicate that hitronic 60 is compatible with steels similar to CA6NM (irpeller naterial).
$, ,, I-R is in the process of testing the Nitronic 60/CASNM combination, althoagh v even without this data,1-R says that the Nitronic 60 will be superior to the existing K-Monel.
Corrosion resistance Nitronic 60 compares with 304 stainless steel for corrosion resistance and is non-corroding in borated water. 1-R does not anticipate any corrosion problems for this application. Thermal Expansion The coefficient * '*P " " " * ***" '"
- 8.8 - 9.2 x 10-6in/in *F. The ring is pressed into a 304 staini suctionnozzlewhichhasacoefficientofexpansionof9.4x10gsssteel . The effect of the thermal transient has been reviewed and the Nitronic 60 material is suitable.
Please advise if you require any additional information. Very truly yours, )
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C. Fergus k Project .anager CF/ COB:rre V-PCE-2792 F43615 Distribution on Attached Sheet
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i DISTRIBUTION V-CE-192 F . cc: Messrs:. E.. E. Van Brunt, Jr. -
'J. Vorees W..H.' Wilson W.' G. Bingham R. H. Holm J..W. Dilk.
-G. A. Butterworth -
S. N. Mager D. B. berine W. t.. MacDonal d J. R. Bynum J. Kirby
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! $ 7 ~, ~ l Arizona Public Service Company a**
hil North Central E ~5 1 Phoenix, Arizona, 85036 7 em so, l 1
Subject:
LPSI Pumps Pailure to Start .] en ~ l Beference: (A) V-CE-20h8B dated 10/17/83 u a o-(B) V-CE-20397 dated 07/29/83 amm -q am arm. - Deer Mr. Andognini: ie a me c.pq You ' T@cc 5.uw To date ANFP Palo Verde has experienced the failure of two LPSI W 7s to steG " ee y.s.m-Unit I Pu=p B and Unit II Pump A. These failures anc some of t's, g. tic .:
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are described in Eeferences (A) and (B). Although all the contributing lactoTs to the root cause for the failure to start have not been co=pletely defined, cent act _between the impeller and casing ring does occur which prevents the start. Tne possible contributing factors identified are shaft stiffness, radial bearing asse:bly, ( impeller centralization, casing ring naterials and clearances, and motor perfomance.
'Ihis letter presents C-E's reco:. mended plan of action to eliminate this failure to start problem.
LPSI Pumes
- 1. Limit Shaft Movement A. Our vendor advises that "a r'sview of the pu=p and motor . design does not indicate any areas for gross shaft movement or misaliEnsent" and that " shaft loads and deflections have been reviewed with the conclusion that the shaft is adequately sized to limit deflection due to bending." Investigation is continuing in this area as is exa=ination of motor bearing clearances.
B. A program is under way to check the axial and radial sbart movement , vs. Ioad for the IB motor at the Westinghouse Phoenix facility and for I l the 2A motor on site. If axial and/or radial play is excessive, the l radial bearing internal clearance can be reduced by replacing the j radial bearing. The thrust bearing 0.D. to bearing housing I.D. 1 clearance can be reduced by reworking the bearing housing. Radial bearings are readily available and a drawing is being made to show the reduced thrust bearing clearance if that also is required. I-R Engineering and Service personnel are on site to accomplish these checks. ( An initial verbal report of examination of the original 1B motor now at Westinghouse's Phoenix facility indicates mechanical problems with the upper (radial) bearing assembly. Examination of the upper bearing I
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=
h assemblies in the LPSI 2B replacement motor and 2A motor is recommended.
- 2. Assure Centialization of Impeller in Casinst Ring
. A. '- The casing ring I.D. will be . checked for concentricity to the casing stuffing box ext'ension rabbet fit to check for machining accuracy, distortion due to excess beat at pipe velding, and excess nozzle loads. An I-R serviceman is on site working with C-E/APS to make the necessary tooling. Completion is expected by October 28.
B. Westinthouse is to review the air gap for motor / rotor centralization and to comment ly October 28. C. At pu=p reassembly, the allovable run-out on the male rabbet of the stuffing box extension vill be decreased from .005 inches to .002 inches TIR. Locational fits vill also be develed to limit move =e'nt after alignment is achieved. 3 Casing Rings A. Material C-E and I-R recommend the use of Nitronics 60 in lieu of the Monel K-500. The Nitronics 60 material has been evaluated The as' an acceptable Nitronics rings can be
' wear ring material for this application. \- made available to the site within ten days. C-E and I-R recommend that they be installed in the LPSI 1B pump prior to the testin5 recommended in item 6.
The ring impeller _cle_arance should be within a range of .029" .036" B. inclusive. Is . Serrate Impeller . It is recommended that,the impeller ring fit areas be serrated to make this area less sensitive to any contact and to minimize the effect on ptmp head and capacity in the event of a larger clearance between this area and the casing ring for any reason.- I-R can provide the necessary machining information by November 1st.
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5 Check Motor Tornue Existing data does not conclusively prove that the motor output is correct. I-R and Westinghouse are reviewing the existing data and investigating possible ways to perform a locked rotor test.
- 6. Testing C-E recommends that the changes outlined above be made on the Unit I LPSI Pasps, and that 100 starts be perfomed on LPSI 2B pump to verify ability
( - to start. The number and sequence of starts to be made at miniflov and thru the 6 inch bypass line as well as defining an acceptance criteria, are to be detemined prior to the test.
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I C-E also recommends that the seal piping be vented prior to each test start and results of venting recorded. After four successive ventings occur that indicate that no air is present, then venting operations may be
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suspended uritil every 10th start. Containment Spray Ptanps C-E and k-R vill continue to evaluate the containment spray pu=ps for determining if the modifications recommended for the LPSI pumps should be considered for these pumps. Eitronie 60 casing rings can be made available as replace =ent rings for the Unit I and II LPSI Purps approximately ten days after receipt of your concurrence with these recommendations . We wish to. proceed as expeditiously as possible on the above. Should you have ' any questions and or any objections to our recommendations, please infor: us as soon as you are able. Very truly you s, Ok{ 1 *.L s'.Q DV C. Ferguson Project ManaEer CF/CDB:rre V-PCE-2759 Tk3565 cc: Messrs: E. E. Van Brunt , Jr. J. Vorees - W. B. Wilson W. G. Bingham R. B. Bolm J. W. Dilk G. A. Butterworth S. 3. Mager D. B. Amerine W. L. MacDonald J. R. Bynum , J. E. Kirby J. D. Hayes k
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M POWER SYSTEMS Noveder 11, 1983 g 'u'"* _p-V-CE-19298 g m + y- 0% ! .-
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Mr. E. C. Andognini 4,j, _-~ ~ ag* 7 Arizona Public Service Company ~ o _. .g P.O. Box 21666 - Sta. 4015 N 7 Phoenix Arizona 85036 e -- so- a=
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Subject:
PNVGS Containment Spray (CS) Pumps I.2sn
Reference:
(A)V-CE-19218, dated 10/28/83, .s v e r * *** LPSI Pumps Failure to start '8,,b.
- sie 6 $Ui Dear Mr. Andognini se E
sms Reference (A) addressed the LPSI Pumps in detail and also stated hi. C-E ano._ I-R would continue to evaluate the CS Pugs with regard to recommending any t' **J3 modifications. The CS Pumps have nojt experienced any failurcs to start, and,= s.= sus , based on their engineering analysis /to date) 1-R informs C-E that no changes c.e.giw ar. are required to ensure pump starting capability. ec, s. waam e Hwever, since the pugs are disassembled it would be an opportune time, if APS so chooses, to implement some currently available modifications that would provide corrponent enhancement. The modifications are as follws: 1. install Nitronics 60 casing rings
- 2. maintain the ring clearance within a range of .025 .032 inches inclusive.
- 3. serrate the igeller ring areas.
C-E and I-R also suggest that the follwing checks be made to determine the current status of the CS Pu@s: '
- 1. casing concentricity (boring bar)
- 2. motor shaft radial movement (200 lb. push-pull).
C-E feels that implementation of the above modifications would provide assurance of greater margin in the area of any problem similar to that experienced on the LPSI Pumps. The modifications would be relatively simple to perform at this time. The Nitronic 60 rings can be made available for the Unit 1 & 2 CS Pumps in approximately one week. , l We wish to proceed as expeditiously as possible on the above. Should you have l any qu'.stions and or any objections to our recomendations, please inform us as
.w.. s you are able.
Very truly yours, J e c :;g l C. Fergu l Project nager j
e.
.M t,ts75
. . C E Powcr Systems Tel 203/6591911 p. w
*. ' ' Combus:, ,r. En; nee'ing inc 1o03 Fr:spect Hab Coad Telex 992S7 gyjg windsor. Conne:ticut o6095 WAy7 g S MS v-cE- 3oi73 April 30,1984 J y" c .m.
l e e. . . Mr. E. E. Van Brunt, Jr. ""
#'n Arizona Nuclear Power Project M.y P.O. Box 21666 - Sta. 3003 -
CS. Phoenix, Arizona 85036 ;l p 3 w.
Subject:
LPSI Recovery Program - M,,,
Attachment:
Summary of Shaf t Motion ' v/w
Dear Mr. Van Brunt:
i E.1 ^t R T.Hs n This letter provides shaft deflection data from Westinghouse tes Mr arttaf f d o - and additional information relative to the resolution of the LPSI f ailure to start problem. #{dn T_est Data: Three motors were tested by Westinghouse at their Buff alo plant between March 28 and Merch 30, 1984; a Palo Verde LPSI motor, a Duke LPSI motor, and a Palo Verde containment spray motor. Deflection measurements were taken with the pump end of the motor shaft exposed. Two configurations for each motor were tested, one with the impeller removed, the other with the
- - inpeller installed. The summary of data, Attachment 1, was received from Westinghouse at a meeting on April 13, 1984 A final report f rom Westinghouse has been promised for May 18, 1984 C-E concludes from this data that the Duke LPSI motors have little deflection at the shaft impeller end during the starting transient compared to the Palo Verde LPSI motor. Also, it is clear that the measured deflections are well within the mininam radial wear ring clearance of .013 inches.
Replacenent Motors for Units 2 & 3 As we advised you on April 25, IR/ Westinghouse has verbally recommended that the remaining LPSI pump motors be replaced with Containment Spray (CS), motors. They proposed a July 1,1984 shipment date for the first two motors to be used for Unit 2 with four (4) additional CS motors to ship at the end of 1984 for Unit 3. Based upon our discussions with you and J. Houchen - IR was advised that the first two must be on site June 15, 1984 Furthermore, the shipment dates for the last four motors need to be more definitive. We are waiting their formal response which they say will be forthcoming early this week. We will keep you advised. We have been advised by Ingersoll Rand that the containment spray (28) motor which was returned to Westinghouse for repair is scheduled for shipment to the (' site no later than June 13, 1984 i
W-CE-3M ys a Two Duke LPSI motors were shipped April 27, 1984 from -[T D_ uke Mo_ tor Shipnent: the Westinghouse f acility in Charlotte, North Carolina. They can be installed (. in Palo Verde Unit 2 as replacements for the present LPSI motors in the event that-the replacement CS motors are not available in time to support the s chedul e. Please advise us prior to any decision on the installation of these motors. Note that the Duke LPSI motors and the new containment spray configuration motors will incorporate the latest bearing lubrication modifications to preclude oil leakage. Please contact me or Dave Amerine, should you have any questions. Very truly yours, O jg . C. Ferguson, CF/TEF:jlb grojectManager V-PAK-628 F47838 cc: Messrs: G. C. Andognini - w/e J. Vorees - w/e ( W. H. Wilson W. G. Bingham - w/e R. H. Holm J. W. Dilk G. A. Butterworth S. N. Mager D. B. Amerine - w/e W. L. MacDonald J. R. Bynum G. D. Houchen - w/e l 1 I I 1 1
. l
Attachment (1)
IATA S F N W LPSI B CS/ IPSI II:p. D.:ke/LPSI Irp. CS/CS Irp. Palo Verde . N3 Irpeller_ 11.93 2.098 2.093 Min. 2.42 Ave. 12.9 2.42 2.636 2.636 mx. 14.02 With Impeller 17.76 7.95 3.899 Min. 5.83 Ave. 20.18 9.8 14.3 6.175 mx. 22.61 Nffalo Na Impeller Min. 20.7 2.58 3.48 Ave. 22.8 3.50 5.43 g
- mx. 24.3 3.96 8.15 With Ir:peller Min. 26.5 4.94 4.6 '
Ave. 29.4 6.62 7.0 mx. 34.9 8.33 9.5 e 9 1988'< (8) L
l s l
- C-E Power Syst:ms Tel. 203/688 1911
, ' , . ,' , Combustion Engineenng inc Telex 99297 1000 Prospect Hill Roac Winasor. Connecticut 06095 POWER H SYSTEMS January 26, 1984 V-CE-20584 V-SF-1663 Mr. W. G. Bingham Bechtel Power Corporation 12400 East Imperial Highway Norwalk, California, 90650 Subj ec t: Statistical Basis for LPSI Pump Starts
Reference:
V-CE-20568, dated Jar.uary 12,1984, "LPSI Pump Recovery Program Meeting"
Attachment:
LPSI Pump Reliability Dear Mr. Bingham Comment f 6' of the Reference requires a statistical basis for the number of tes t starts during Phase III of the LPSI Pump Recovery Program. The Attachment provides that basis and is provided per our discussion and agreement on January 25, 1984. Due to the agreement between the C-E and BPC analyses, Table 3-1 provided by BPC is substituted for that in the C-E analysis as it more clearly identifies confidence levels. Very trul yours: X 63?& Jos m a l
- t .u-~
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D. B. Amerine ._>. E-+-.
$ r[*""
cca J. Vorees - G. C. Andognini W. H. Wilson ca.~1 % no > D. Arrigan G. A. Butterworth .T 'm - 7,Q ((i J. R. Bynum J. W. Dilk
--- ] ,,,,, , ,
a i na I D. Hayes fs" f J. D. Houchen -- c>
- 5 !
R. H. Holm J. Kirby g Il.' T. Mack g]y ---- - uns w S. N. Mager W. L. MacDonald
,yj
_. .} a ymy R. Randels m e E. E. Van Brunt, Jr. "' ' i
1, . . At tach 20nt Page 1 LPSI PUMP RELIABILITY 1.0 SYSTEM RELIABILITY REQUIREMENT In the absence of an industry standard or regulation specifying a
. required system reliability goal for the Low Pressure Safety Injection System (LPSI), a survey was performed of reported PRA results to determine a range of system reliability values which are typical of operating plants. Th!.s range of system reliability values was used to determine a minimum " acceptable" value for the Palo Verde LPSI System.
Seven PRAs were reviewed to determine the calculated unreliability of LPSI. Results of the survey are presented in Table 1-1. Following the methodology of WASH 1400, the highest and lowest values from the survey were-averaged in order to calculate a log normal median value. This median value is used below as the criterion to determine the ' minimum number of LPSI pump start-up tests that are required ,to demonstrate adequate pump reliability. Tgelognormalmediar. value between ,ghe highest vglue (4.7 x 10 ) and the lowest value (2.5 x 10 ) is 1.1 x 10 2.0 ' LPSI SYSIEM RELIABILITY MODELS i Fault tree analysis was employed to determine the reliability of the PVNGS LPSI System. The methodology employed in this analysis is consistent with and is described in CEN-239 Supplement 3. The f ault tree models were used to determine the PVNGS LPSI System reliability for various LPSI pump failure rates. A system description and list of the assumptions made in performing the fault tree analyses are i provided. The results of the fault tree analyses and probabilistic j evaluation are used as input to determine the LPSI pump reliability requirements and are discussed in Section 3.0. 2.1 System Description i A schematic of the PVNGS LPSI System (Injection Mode) is presented in Figure 2-1. The injection mode of operation is l initiated upon receipt of a Safety Injection Actua tion Signal (SIAS). A SIAS is produced upon any two coincident low pressurizer pressure (1700 psia) or high containment pressure signals. The SIAS may also be initiated manually in the control room. Upon a SIAS, the LPSI pumps automatically start and the LPSI header isolation valves open. During injection mode, the minimum flow lines downstream of each pump are ' apt open to prevent possible daad head operation. The pump: take suction from the Refueling Water Tank (RWT) and the discharge through four LPSI header isolation valves via two redundant LPSI headers. The safety inj ection water then flows to the reactor vessel through a safety injection nozzle on each of the four RCS cold leg pipes. If offsite power (normal AC) is unavailable, the ESF buses are connected to the diesel generators and safeguard loads (the LPSI System). are then started in a preprogrammed time sequence.
.- ,' [ttech nnt L Pcge 2 When the RWT level drops .to its predetermined low level at the end -of the safety injection phase, a recirculation actuation signal- (RAS) is - generated. The RAS signal stops the LPSI pumps and ends LPSI. System operation.
2.2 Assumptions
- The LPSI System fault tree analysis is based on the methodology employed in CEN-239, Supplement 3. Component failure data used in the probabilistic evaluation cf the fault . tree was also derived from CEN-239. The following additional assumptions were made in performing the fault tree analysis for Failure to Deliver Sufficient LPSI Flow:
- 1. System failure- is defined as the inability to deliver sufficient LPSI flow to the reactor core. Sufficient LPSI flow is defined as one LPSI pump flow to two RCS loops.
(Two 'flowpaths are required to deliver the flow from one
. pump.)
- 2. Isolation of the pump mini-flow lines could result in dead
,. head operation and damage to the pumps.
? The only operator action considered was manual backup of 4
SIAS from the control room.
- 4. It is assumed that components on Train A receive SIAS-A and components on Train B receive SIAS-B.
- 5. To facilitate tree construction and evaluation, it was assumed that components on Train A are aligned to Train A electrical supply buses and components on Train B are aligned to Train B electrical supply buses.
- 6. Maintenance error resulting in the advertent isolation of a LPSI pump has been included in the analysis.
- 7. Palo Verde's periodic test and maintenance program is
! assumed to preclude wear-out type failures.
l 8. Palo Verde's pump modifiestions are assumed to be adequate to prevent the failure mode described by this Recovery program. 4 3.0 LPSI PUMP RELIABILITY REQUIREMENTS The results of the fault tree analyses for the LPSI System are shown in Figure- 3-1. The results are presented as a plot of the unreliability of the LPSI System as a function of LPSI pump failure I rate. The LPS pump failure, was varied from 10 )/ demand to / demand. 10 { ate Thefor failure curves to start generated areonused demand to relate the LPSI System unreliability to a LPSI pump reliability requirement. The number of tests required to demonstrate a certain LPSI pump unreliability was then determined using a binominal I distribution shown in Table 3-1. I
. . Att0chn;n t
, pyg ,3 For example, for the LPSI System function, a survey of PRA literatgre was used to determine a median LPSI System unreliability (1.1 x 10 ). <
Using the curve in Figure 3-1, a corryponding LPSI pump unreliability requirement of approximately 3 x 10 is f ound. The best number of tests required to demonstrate a failure rate of 3 x 10estgmate is found using Table 3-1 and is approximately 24 tests for a 507. confidence level and 99 tests for a 95% confidence level.
4.0 CONCLUSION
l With the performance of 100 LPSI pump start-up tests with no failures, the LPSI pumps will have demonstrated sufficient reliability with 957. confidence that the reliability of the LPSI function will be adequate. l 1 l f l P m __ _._ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ . _ _ _
Table 1-1 LPSI UNRELIABILITY PRA UNRELIABILITY REFERENCE Reactor Safety 4.7 x 10" Wash-1400 Study Page 11 - 137 German Risk 1.7 x 10" The Federal Minister of Study Research and Technology, August 15, 1979
~
. Zion Safety 2. 5 x 10 Come:nwealth Edison Study S tudy, Page 1. 5 12 -
~ '
Sequoyah 1. 9 x 10 NUREG/CR-1659/1 of 4 RSSMAP Page B.7 - 10 Oconee Unit 3 2.4 x 10 ~3 NUREG/CR-1659/2 of 4 RSSMAP Page B.6 - 14 C-E Generic 1.0 x 10' CEN-156 PWR l l l l 1 1
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. e.
TABLE 3-1 Binomial Tables Number of Tests Without Failure Vs Reliability and Confidence Level Confidence Level, Percent Reliability (R) 50 60 70 75 80 85 90 95 97.5 99 '99.5 '99.9 0.999999 693150 916290 1203970 1386290. 1609440. 1897120 2302590-- 2995730 '3688889 4605170 5298320 6907760 0.99999 69315 91629 120397 138629 160944 189712- 230259 299573 -368889 460517 529832 690776 0.9099 6932 9163 12040 13863 16094 18971 23026 29957 36889 46052 52983 69078 0.999 693 916 1204 1386 1609 1897 2303 2906 3689 4605 5298 6908-0.998 347 458 602 694 805 949 1152 1493 1845 2303. 2650 3454 0.997 231 305 401 462 537 632 768 999 1230 1535 1766- 2303. 0.996 173 229 301 346 401 473 575 747 920 1149 1322 1723' O.995 138 183 241 277 321 379 460 548 737 920 1058 1379 230 267 315 383 498 613 765 880 1148 0.994 115 152 201 0.993 99 130 174 198 229 270 328 427 526 657 755- 985 0.992- 86 114 150 173 200 236 287 373 460 574 660 860 134 153 178 210 255 332 408 510 586 764 0.991 77 101 120 138 160 188 229 298 367 459 527 688 0.99 09 92 60 69 80 94 114 149 183 228 263 342 0.98 34 45 0.97 23 30 40 45 53 62 76 99 121 -151 174 227 0.96 17 23 30 34 39 46 57 74 91 113 130 170 0.95 14 18 24 27 31 37 45 58' 72 90 103 135 0.94 11 15 20 22 26 31 37 49 60 75 86 112 0.93 10 13 17 19 22 26 32 42 51 64 74 96 0.92 9 11 15 17 19 23 28 36 45 55 64 83 15 17 20 25 32 39 49 57 74 0.91 8 10 13 9 12 13 15 18 22 29 35 44 51 66 0.9 7 0.8 3 4 6 6 7 9 11 14 17 21 24 31 2 3 4 4 5 6 7 9 11 13 15 20 0.7 3 4 4 5. 6 8 9 11 14 0.6 2 2 3 2 2 3 3 4 '5 6 7 8 10 ' 0.5 1 1
*e C-E Power Systems Tel 203/6881911 yg Combustion Enginnnng Inc. Terex 99297 ,
- 1000 Prospect Hill Road Windsor. Connecticut 06095 _"h M 9 02 ;._
i . l 2 7'64 ( POWER
.2 SYSTEMS * " " * ^ * '
V-CE-19784 L , r,m - Februa ry 20, 1984 __ _cw ; tk -y* __. l Mr. W. G. Bingham o .*= l Bechtel Power Corporation E 12400 East Igerial Highway Norwalk , CA 90650
-~j nm
*e 1 Da
Subject:
Preparation for Interim Use of Containment Y Spray Motors with LPSI Pugs 7 . 7 l w ow .)
Reference:
(A) V-CE-19720, dated February 8,1984 -;f!(, --.
- v. w _
Dear Mr. Bingham:
-Z res Reference (A) identified four steps in the testing to evaluate ts( ::: cf tic [ [,7, , m CS motors on the Unit 1 LPSI pu@s. The second of the steps was 'the evaluation-of the air test results and the decision for interim use of containment spray motor on the LPSI pu@s. The follwing is a summary of C-E's evaluation concluding that a CS pump motor should be transfered to Unit 1 for installation on the IB LPSI pump.
The CS motor operation without the impeller and with the LPSI pump impeller show significant improvements over previous tests with the LPSI pu@ motors. The maximum and mean deflections for the CS motor are: No Impeller LPSI Impeller CS Impeller Max. Mean Max. Mean Max. Mean 2.6 2.4 14.3 9.8 7.4 5.8 These compare with LPSI motor deflections of: Max. Mean Ma x. Mean 15.7 14.3 29.2 26.4 The W analysis was reviewed at a meeting in Pittsburg on February 14, 1984 The results igly that the shaft end deflection with the LPSI igeller is reduced by using the CS motors. The comparative deflections are; LPSI motor 15.7 mils and CS motors 12.7 mils. This improvement is less than tests have sh w n, but the trend is similar. Results from analysis performed by an independent consultant indicate a 3 to 1 improvement between the LPSI motors and the CS motors. ( Further supporting analysis is being done by C-E. The results are expected by February 24, 1984.
, \
~
. , 1 As there has not been a failure to start with the CS motor and pump, and the above results support the contention that failure would not occur to that motor / pump combination, the concensus of test results, analysis and engineering judgement supports CS motor installation in the Unit 1 LPSI pump for final ;
evaluation of this motor as an interim resolution for the failure to start l problem. . The following test program is recommended to provide documented test results which will be used for justfication to allow the interim use of these motors on the LPSI pumps through fuel load in Unit 1.
- 1. Transport one Unit 3 CS purp motor to Unit 1 and install on LPSI pump 1B.
- 2. Conduct the two hour motor run-in required after previously completed bearing housing modification to resolve oil leakage problem.
- 3. Conduct .a series of 5 instrumented water tests measuring shaf t deflection at the upper bearing and below the lower bearing. (Using Neolube blue the impeller and wear ring). A flowrate of 2100 ; 100 gam is to be used.
- 4. Inspect the wear - ig and impeller surfaces for comparison with inspection results from previous water tests conducted with the original LPSI mctor.
- 5. Conduct 100 start test using a flow rate of 2100 : 100 gpm.
- 6. Disessemble, inspect and evaluate.
i ( 7. If the results thru step 4 are satisfactory install a second containment spray motor on LPSI A. In addition, either before or after the above tests, the radial play of the upper bearing in the two CS motors used in the test program should be reasured for comparison. C-E recommends that the containment spray motors be used with the existing bearings. The above use of the CS motors is recommended as an interim measure to allow fuel load to proceed in Unit 1 without further delay while final resolution details are developed. Very truly yours, gg,g . Ferguson,
. Project Manager CF/TEF:jlb V-PAK-540 F47748 cc: Messrs:
E. E. Van Brunt, Jr. G. A. Butterworth j G. C. Andognini S. N. Mager J. Vorees D. B. Amerine W. H. Wilson W. L. MacDonald R. H. Holm J. R. Bynum J. W. Dilk
.s.
l . ,,, ' C.E Pow:t Sy;t:ms Tel 203/6SD-1911
* 'Cornbustion Enginrering Inc. Telem 99297
- 1U00 Presp::t Hill Road Wincsor, Connecticut 06095
~
~..
g
.v. t e 1 'C' POWER ,
h " SYSTEMS 1. 1 P84
# '"'~~^
March 9, 1984 V-CE-21628 i
- 45**5 V-SF-1790 cv E1 u,
cc
.)me.
no . . . l [_OF0 7 . . .' Q t Mr. J. D. Houchen _l ',* ,, !-- Arizona Public Service Company 8
,, ie O. Box 21666
'P.
Phoenix, Arizona, 85036 ff
- c ias y um _.
Subjectr LPSI Pump AB 100 Star t Tes t /2^ --E$Ito ;;
Reference:
PVNGS-LGP-MS3-171, dated December 30, 1983
~: y- -
ae m o,i _. 5 XM13
. Dea r Mr. Houchen: a s.muecar --
. __ _ L On March 7, 1984, LPSI Pump 1B successfully completed 100 starts using a Containcent Spray Pump mt tor per the LPSI Pump Recovery Program described in the Reference. The pump was disasse= bled on March 8, 1984, f or visual observation of the upper and lower casing rings and impeller wear surfaces.
A meeting was held on site on March 9, 1984, to discuss the results of the tes t and inspection. It . was agreed by all a ttendees that the LPSI pump had successfully completed the 100 starts portion of the test. Since evidence of contac t was observed, a comparison against a visual s tandard was required to verify acceptance of the test. Before that inspection was conducted, soce of the evidence was mistakenly cleaned on the impeller and part of the lower casing ring. Sufficient evidence remained on the casing ring for the Ingersoll-Rand metallurgist to determine that the contact mechanism was identical to that observed in laboratory testing, and that using the photographs of the laboratory testing as a s tandard, the amount of contact was acceptable. The APS Operations Engineering representative concurred with that assessment. In addition, BPC reported that, based on photographs taken prior to the 100 start tes t and personal observation folicwing the test' but before the surf aces were touched, there was no evidence of additional contact during the 100 star t test. It was, therefore, the conclusion of all attendees that the 100 start test was successful and the inspection was acceptable. C-E will provide APS Startup with a written report of the inspection and follow up with a formal report submitted through C-E Engineering. Very truly yours, , i MfJ14 Q D. B. Ame,rine C-E S tartup Manager i l
. * . .~ .
Y'~.'V-CE-21628 Pege 2-DBA/SLS:plk i
.cc G. C. Andognini W. G. Bingham J . R. Bynu m C.'Terguson J. D. Houchen T. Mack S. N. Mage r J. C. Moulton W. J. Stubblefield E. E. Van Brunt, Jr.
Attendees: D. Hayes, APS S/U A. McCabe, APS S/U C. Crane, APS S/U G. Sullivan, APS S /U J. Van Wyk, APS S/U K. Schroeder, APS S/U R. Kropp, OPS ENG D. Sachs, OPS ENG D. Amerine, C-E S/U S. Schey, C-E S/U W. Kuntz, C-E S/U D. Blanchard, C-E E. Stoma, I-R R. Miller, I-R V. Najarian, BPC R. Gross, BPC T. Mack, BPC V. Hurray, BPC M. Winsor, NUC ENG R. Badsgard, NUC ENG hh h 4
C-E Power Systcms Tei 203/6661911
,
- Combus: en En;pneenn; mc Tetex 99297
. ', ,, ,1000 Prespe ' HM Aca W,rcso Covect:m 06095 T MS 3,,,11, 19S4 N T9'.
V-CE-21710 r ., t i f 2'
~
V-SF-2073 Ei l 5t! ; A774comovrs
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AECEso w 6 * .2 G - N 3-Mr. V. G. Bingham 7 _ cE. 7 - Bechtel Power Corporation % - . '.i : 12400 Eas t Imperia 1 Highway Z D.- "[_. Norwalk, California, 90650 -}-j _ . i...- ,;
Subject:
Unit I LPSI and Containment Spray Performance Data ,- l
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;...-.-1
Reference:
915U 15I06 - SI Pump Curve Data les t ;--i- .: g----- g i...
Attachment:
- 1) LF5I 1A and 1D Fertormance Curve I' -l
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- 2) Containment Spray 1A Performance Curve
- 3) Containment Sptay 15 Performance Curve _ }_.ffi
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Dear Mr. Bingham:
5}"#1f' Y . a--l --! Combustion Engineering has reviewed the data for Unit I LPSI and Containment Spray performance previded per Appendices C, D, E and F of the reference and finds the data acceptable. Attached are performance curves generated from that data. Data runs on June 2, 1984, for LPSI 1B and May 22, 1984, for the remaining pumps, were used for curve developement. If you have any questions , please contact Bill Kuntz of this office. Very truly yours, l 1 l . d hM4.' d/LMN D. B. Amerine C-E Startup Manager DBA/VDK akj r cct J. M. Allen w/a 0. J. Zeringue J. Black C. Churchman J. R. Bynum w/a C. Crane S. Day C. Ferguson J. D. Heuchen J. Kirby T. Mack S. N. Mager A. J. McCabe R. Papworth W. J. Stubblefield E. E. Van Brunt, Jr. R. Vaughan
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* .** C E P;w:r Syst:ms- Tel 203/685-1911 . , ,., C;mbustion Engiro: ring Inc. Teux 93297 1000 Prespect Hili Acac Windsor. Con .ecbcut 06035 POWER H SYSTEMS August 2, 1984 V-CE- 30704 Mr. E. E. Van Brunt, Jr.
Arizona Nuclear Power Project P.O. Box 21666 - Station 3003 Phoenix, Arizona 85036
Subject:
10 CFR 50.55(e) Report on Los Pressure Safety Injection Punp Failure to Start
Dear Mr. Van Brunt:
Enclosed for your submittal to the Nuclear Regulatory Commission is the 10 .'JR 50.55(e) report on Low Pressure Safety Ir.jection Pump Failures to Start along with the proprietary affidavit. Copies 1 through 25 of the proprietary repcrt are intended for submittal to the NRC. Copies 26 through 43 are provided fr.r APS use. In addition, thirty-five copies of the non-proprietary version are also enclosed. This report is a Final report and is considered complete. If you have any questions feel free to call. Very truly yours, _s. -- C. Fergus Projec r.a ge r CF/TJC:jld Enclosure cc: D. B. Amerine w/ Copy 45 W. G. Bingham w/ Copy 44 G. A. Butterworth J . R . By num J. W. Dilk R. H. Holm W. L. MacDonald S. N. Mager ( W. H. Wilson l W. F. Quinn l
q
..o AFFIDAVIT PURSUANT TO 10 CFR 2.790
~ Combustion Engineering, Inc.
)
State of Connecticut -) . County of Hartford ) SS.: I, A. E. Scherer, depose and say:tha't I am the Director, Nuclear Licensing, of Combustion Engineering, Inc., . duly authorized to make this affidavit, and have' reviewad or caused to have reviewed the information which is identified as proprietary and' referenced in the paragraph immediately below.- I am submitting this affidavit in conformance with the provisions of 10 CFR 2.790 of.the Commission's regulations, and in. conjunction with the construction permit of Arizona' Pnblic Service Company, for withholding ' this information. The information for which proprietary treatment is sought is contained in the following document: CEN-285(V)-P, Report on Palo Verde Nuclear Generating Station Low Pressure Safety Injection Pump Failure to Start, August 1984. This document has been appropriately designated as proprietary. I.have personal knowledge of the criteria and procedures utilized by Combustion Engineering in designating information as a trade secret, privileged or as confidential commercial or financial information. Pursuant to the provisions of paragraph (b) (4) of Section 2.790 of the Commission's regulations, the following is furnished for c;asideration by the Commission in determining whether the information sought to be withheld from
.public disclosure, included in the above referenced document, should be
, withheld.
- m. ,___ _ e--- 1 r
e l
- l. The information sought to be withheld from public disclosure are testing and analysis done to resolve the Palo Verde 1.ow Pressure Safety Injection Pump failures to start, which is owned and has been held in confidence by Combustion Engineering.
- 2. The information consists of test data or other similar data concerning a process, method or component, the application of which results in a substantial competitive advantage to Combustion Engineering.
- 3. The information is of a type customarily held in confidence by Combustion Engineering and not customarily disclosed to the public. Combustion Engineering has a rational basis for determining the types of information customarily held in confidence by it and, in that connection, utilizes a system to determine when and whether to hold certain types of information in confidence. The details of the aforementioned system were provided to the Nuclear Regulatory Commission via letter DP-537 from F.M. Stern to Frank Schroeder dated December 2, 1974 This system was applied in determining that the subject document herein are proprietary.
- 4. The information is being transmitted to the Commission in confidence under the provisions of 10 CFR 2.790 with the understanding that it is to be received in confidence by the Commission.
- 5. The information, to the best of my knowledge and belief, is not available in public sources, and any disclosure to third parties has been made pursuant to regulatory provisions or proprietary agreements which provide for maintenance of the information in confidence.
6 Public disclosure of the information is likely to cause substantial harm to the cnmpetitive position of Combustion Engineering because: u
i g. v i.... e,-
- a. A similar. product is manufactured and sold by major pressurized water reactor competitors of Combustion Engineering.
b.- Development of this information by C-E required thousands of ,- manhours of effort and hundreds of thousands of dollars. To the best of my knowledge and belief a competitor would have to undergo similar expense in generating equivalent information.
- c. 'In order to acquire such information, a competitor would also require considerable time and. inconvenience related to testing and analysis of the Palo Verde Low Pressure Safety Injection Pumps.
- d. The information required significant effort and expense to obtain the licensing approvals necessary for application of the information.
Avoidance of this expense would decrease a competitor's cost in applying the information and marketing the product to which the information is applicable,
- e. The'information consists of testing and analysis done to resolve -
the Palo Verde Low Pressure Safety Injection Pump failures to start, the - application of which provides a competitive economic advantage. The availability of such information to competitors would enable them to modify
.their product to better conpete with Combustion Engineering, take marketing or other actions to improve their product's position or impair the position of Combustion Engineering's product, and avoid developing similar data and analyses in support of their processes, methods or apparatus,
- f. In pricing Combustion Engineering's products and services, significant research, development, engineering, analytical, manufacturing, licensing, quality assurance and other costs and expenses must be included.
.The ability of Combustion Engineering's competitors to utilize such information
o i..- 1 without similar expenditure of resources may enable them to sell at prices reflecting significantly lower costs.
- g. Use of the information by competitors in the international marketplace would increase their ability to market nuclear steam supply systems by reducing the costs associated with their technology development. In addition, disclosure would have an adverse economic impact on Combustion Engineering's potential for obtaining or maintaining foreign licensees.
Further the deponent sayeth not. A - 124J: A. E. I erer Director 'I Nuclear Licensing Sworn to before me thisd dayofbly'A ' AMtc( kbtwtbr'44/ ic Nota ry P,ub}'J ' WINDECKER DIANC . Norant rt' tit it M CD'AMihgegN LAPiPLS MaWCH 31. IM
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