ML20071H345
| ML20071H345 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 02/18/1982 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Faulkenberry B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, ANPP-20213-GHD, DER-81-25, NUDOCS 8203080383 | |
| Download: ML20071H345 (10) | |
Text
{{#Wiki_filter:(' '. Docket Nos. 50-528/529/530 }l[y $0 35(e) Report Y YY WW50 SA$b $bS$<,rY$ P. O. BOX 216 6 6 PHOENIX ARIZON A 85036 February 12, 1982 ANPP-20213-GHD/BSK U. S. Nuclear Regulatory Commission CD p Region V c3 Creekside Oaks Office Park .9 fiEcgypgO g 1450 Maria Lane - Suite 210 Walnut Creek, California 94596-5368 g, Attention: Mr. B. H. Faulkenberry, Chief 2 05;g g g g Reactor Construction and Y Engineering Support Branch Ng / Subj ect: Final Report - DER 81-25 4 A 50.55(e) Report Relating to Bingham-Willamette N Auxiliary Feedwater Pumps Could Not Be Rotated By Hand For Maintenance During Storage File: 82-019-026 D.4.33.2
Reference:
(A) Telephone Conversation between T. Bishop and G. Duckworth on August 18, 1981 (B) ANPP-18945, dated September 18, 1981 (Interim Report) t (C) ANPP-19792, dated December 29, 1981 (Interim Report, Revision 1) l
Dear Sir:
Attached, is our final written report of the deficiency referenced above, which has been determined to be Not Reportable under the requirements of 10CFR50.55 (e). Very truly ours7 Q A LLL.- E. E. Van Brunt, Jr. APS Vice President Nuclear Projects ANPP Project Director EEVBJr/GHD:ske Attachments I' 03d cc: See Attacaed Page 2 2C :2113 S2 8B ic;j \\fT' ? Da 820308o3e3 82021s GAG 03U $DRADOCK 05000528 Q c i PDR J ns _ ga 49
i i U. S. Nuclear Regulatory Commission Attention: Mr. B. H. Faulkenberry, Chief ANPP-20213-CHD/BSK February 18, 1982 Page 2 cc: Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Wasnington, D. C. 20555 J. A. Roedel D. B. Fasnacht G. C. Andognini F. W. Hartley J. M. Allen A. C. Rogers B. S. Kaplan W. E. Ide J. Vorees J. A. Brand A. C. Gehr W. J. Stubblefield W. G. Bingham R. L. Patterson R. W. Welcher R. M. Grant D. R. Hawkinson L. E. Vorderbrueggen R. L. Greenfield Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503 Ms. Patricia Lee Hourihan 6413 South 26th Street Phoenix, Arizona 85040 l l l [ i
FINAL REPORT - DER 81-25 DEFICIENCY EVALUATION 50.55(e) ARIZONA PUBLIC SERVICE COMPANY (APS) PVNGS UNITS 1, 2 AND 3 I. Description of Deficiency Eight (8) of a total of nine (9) Auxiliary Feedwater Pumps supplied and shipped by Bingham-Willamette were disassembled during storage because they could not be rotated by hand for maintenance. Storage and maintenance of this equipment was performed by Bechtel, as per Bingham-Willamette Instruction Manual (Log #M021-157-2), and included dry rotation of the pump shafts. The conditions noted included galling of the shaft, rubbing of impeller case rings / throttle bushing, and metal filings. l All eight (8) pumps were returned to the Bingham-Willamette factory in Portland, Oregcn and upon inspection, the binding was found to be caused by galling of the stainless steel center stage piece and stainless steel shaft sleeve. The equipment Tag Numbers are 1-and 2-M-AFA-P01; 1, 2-and 3-M-AFB-P01; and 1, 2-and 3-M-AFN-P01. Pump Number 3-'M-AFA-P01 had not yet been shipped. II. Analysis of Safety Implications Bingham-Willamette prepared and issued a new procedure for packing, shipping, and storage, which eliminated the dry rotation procedure by shipping the rotating element separate from the pump casing. Bingham-Willamette indicated that this action would resolve the condition and that the binding caused by the galling would not preclude the pumps from performing per design intent. Bechtel Engineering requested that a verification test be performed, particularly for shaft deflection during future storage and stand-by conditions, wherein the pump shafts could again be subjected to galling. Bingham-Willamette completed the requested test on December 18, 1981. Copics of the test procedure and test report are attached. The special test verified that these pumps are acceptable as supplied for the Auxiliary Feedwater System. This condition is, therefore, evaluated as not safety significant and not reportable, since if left undetected and uncorrected, it would not have impaired the safe functioning of the Auxiliary Feed-water System. III. Corrective Action Bechtel has verified that the test results demonstrate the pump design is satisfactory, and will implement the revised storage procedure for these pumps.
Bechtel Pov/er Corporation Interoffsce Memorandum Cl Distribution 3 October 8, 1981 BinE ao-Willamette Auxiliary h '" * ' Feedwater" Pump Hetal to Metal A. J. Ortiz Contact Proble= Engineering g Los Angeles 3420 D. R. Bona'no At E n t. Cecies to Power Division /ggy _ H. C. Bream ma - W. L. Dornaus 'g,' ,p g H. W. Gilliland g' J. W. Mowatt s-y 4, / l '-.'. \\, (;,, } t g j L. R. Oquist 'J R. E. Ravetti ~ ~l ~ OCT L D. Robb 0 $$ Z T *. '..?. _.. _ R. E. Weber 2 en,,7Et.,3[
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~~ ~~ e. .Ts..:..-[/;~ '-LX. ~~ - v. Nr g --).: 5.' n.~ ~ q y k'---T e __so - -fz-i g-3 ,.rtr. .r y --{f j Enclosed is the Bingham-Willamette Pump Integrity Test Procec use l for your information. The LAPD Mechanical Staff and Will Dormrt r_,,.v.T__ of SFFD have reviewed the procedure and have accepted it. B1 g- { l Willamette will proceed with the test on the basis of the en c e.] i_t. ~. 5,f-;'{ _-l l procedure. c A_ _ _ ai A. J. Ortiz AJ0:sp Distribution S. Agerbek s Z. Csukonyi S. S. Dua H. D. Farin L. Jaw J. R. Schuh C. H. Shinbrot R. R. Sciens. a.Ao-eoee tot Assonnel is/Ts
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i r. \\ ,5 f sumac'r StAtt/110F 18Tt44111 TLST ptGCC00tt get satts 4t9CR 1AS4f/St I. StateAt See peep of the above group will be set op is a closed leep with isjectles and recetee eThe parpose of this t sectes of thirty (30) start / steps. leal lategetty of the p.ep. f.e. to demonstrate that the peep can be sehjected to as witheat adverse effects such as series of start /stegne test ul11 na condotted in the fellestag manner: I rotating etteent., prior to setting op la Lt.e test leep the pump will be disassembled. (setedtog the rotattag eletent for customer witress IstpeCtten ff the twtS tateralls.pletter er this laspe "'. Y. I Spen cee-A. Tae peep will then he reassedled sed set up la the test loop, the first start /run cycle three (3) perforsaaca totsts wf'.1 he taken 1stleding appreatmate statova fles. rated flew (1945 EPM) and an latermediate pelat betetenIn additten to perform Certet 8. state.s fles aed rated flev. Af ter the above data has beta acqetred. the else 64 tates at each of the above flems. driver ulti he de anerstaed and the first start / step allt be coactoded. Addttlesal start / steps will be perfereed ta as rapid a sequence as possible to the Adequate tweaf ag time uf11 he a11swed fellevlag C. limit of the test ester espshtittles. Sata te be recorded each start to keep the test seter temperatures as les as possible. during each svecessive start / step cycle will be the start./ step cycle neeber. Stee and l l apprealeate flew rate. 9detag the final start /run cycle the perforsseca and vibrattaa test util be repeatedpellewf ag tits parreraanse an S. as in 8. abere for esapariser with the aristaat data. j stbrattaa test. the peep will be sket denn and the test concluded. I I !!. f tti cCn31Tt0R_1 Cold City of portland tap water will te used for testf ag, A. Adeq.
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[apactjy: ( calltrated V taturl meters. Suctl6e head is sessered with a pressere gage, and discharge head {s sensored f Wend: S. W pesttles displacasant type dead. weight tester. e ' to.the seter. A calf brated polyphaca vattseter is used to read total pomer. tg en ef ficiescles of the seter (and gear if ter.leted), brate hersepeter supplied C. power: a Ms. ,te the peep shaf t is deterstaed free this tapet power. A teneral padte Corp. Strebatac set sa 1 tee frequency, is used la teajeettles Leed: 3. with 4 Stop watch te Count Slip of SeLer. i
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) There has been a question of possible generic problems related to_. ) desigu l and material selection of auxiliary feedwater pumps supplied by Bingham " l Willamette Company. Palo Verde, Maanshan and Korea Nuclear Units all have pumps of the type in question. A special test was outlined by Bechtel Engineering .o answer these questions. Testing was performed at the expense of Bingham-Willamette. The test was completed on December 18, 1981. It is the conclusion of mechanical engineering that the Binghan-Willamette pumps supplied for auxiliary feedwater service for the above mentioned projects are acceptable. There should be no further reasons to stop payments and manufacturing of pumps that have not previously been shipped. A more complete report of the test is attached. i t f 1 A. J. Ortiz l EWGscs Attachment o e a.ae eese gef asseanal e 9176
AUX 1LIARY FEEDWATER FIMP TEST AT BINGHAM-WILLAMETTE COMPANY For several months there have been meetings between Bechtel and Bingham-Willamette Company engineers to discuss the design of their pops and the selection of materials for the shaf t sleeve and center stage pieces for auxiliary feedvater pumps. Special testing of an auxiliary feedwater pump for the Palo Verde project was performed by Bingham-Willamette Company to simulate field conditions. The pump used for this test was typical in design and materials for peps purchased for Palo Verde Units 1, 2 and 3. Mannshen Units 1 and 2 KNU Units 5, 6, 7 and 8. l Testing was designed to simulaba conditions of manual rotation of a dry l l pump during alignment of pump and driver. Also the pump was subjected to a series of thirty start-stop tests while paping. water. This was to simulate scheduled start-stop tests between full loading in an operating plant. Hydraulic performance tests were conducted at three operating points before and after the start-stop tests. When the tests were completed, the pa p was disassembled and inspected. 1 The overall assessment was that the pump could operate indefinitely I 1 under the test conditions without a f ailure of parts. This verifies to Bechtel Engineering that there is no generic problem with this type of pump design and materials selected.
/ Inspection showed that there had been contact between the center shaf t sleeve and one side of the two piece center stage piece. Contact resulted in several discolored areas on the shaf t sleeve and one discolored area on the stage piece. Two small scratch marks were noted on the shaft sleeve and center stage piece. A very detailed examination of the discolored areas and the scratches was done by Bechtc1 Engineering with participation by Bechtel Procurement and Inspection. The discolored areas on the shaft sleeve could not be felt and did not result in a measurable change in dimensions. This was also true for the center stage piece. Band rubbing with a very fine l abrasive cloth could not remove the discolored spots on either part. The surface became very smooth as the result cf this rubbing but no l other effect was noted. l The scratch marks appeared to be caused by solid particles in the water used for the pump test. These marks were slight and did not result in an increase in measurable dimensions. Rubbing with very fine abrasive cloth made the areas very smooth; but they were still visible. There was no evidence of any transfer of metal between the shaft sleeve l and the stage pieces. s Bingham-Willamette has ' greed to issue additional instructions for a clean-up of shaft bushings and center stage pieces that become damaged by impurities in the water during testing and start-up activities. These instructions will include criteria for determination of when these l parts should be replacad. . l
Based on what was obsened af ter this special test, there should be no requirement for additional parts to be shipped with the pumps to replace ones used in the test. As part of the owner's saintenance program, however, spare parts should be considered and required. If it is required to inspect internal parts of these pumps during normal station operation, it will be necessary to remove the top half of the pump. This is typical of horizontally split pump casings. Frequency of inspection is usually determined by the pump user. Generally, a pump is not opened unless there are signs of distress, such as excessive 1 vibration and noise or loss of hydraulic performance. I It is the conclusion of mechanical engineering that the Bingham-Willamette l l ptunps supplied for auxiliary feedwater service for the above mentioned projects are acceptable. There should be no further reasons to stop payments and manufacturing of pumps that have not previously been shipped. l l l I l l l l l e l seh _}}