ML17059C302
| ML17059C302 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 10/28/1998 |
| From: | Hood D NRC (Affiliation Not Assigned) |
| To: | NRC (Affiliation Not Assigned) |
| References | |
| TAC-M99720, NUDOCS 9811020240 | |
| Download: ML17059C302 (12) | |
Text
LICENSEE: Niagara Mol
'c Power Corporation
" FACILITY:
Nine Mile Point Nuclear Station Unit No. 1 October 28, 1998
SUBJECT:
SUMMARY
OF TELEPHONE CONVERSATION OF OCTOBER 28, 1998, ON CORE SHROUD NEUTRON TRANSPORT AND UNCERTAINTYANALYSIS REPORT MPM-108679 (TAC NO. M99720)
On October 28, 1998, Mr. Lambros Lois of the NRC staff participated in a telephone conference call with Niagara Mohawk Power Corporation (NMPC) and an NMPC contractor, Dr. Manahan, to discuss a sentence in Report Number MPM-108679, "Nine Mile Point Unit 1 Shroud Neutron Transport and Uncertainty Analysis," forwarded to the NRC under NMPC's cover letter dated October 22, 1998.
Participants for NMPC were Messrs. G. Inch and A. Abbasi. The enclosure, which shows the clarification provided during this conversation, was faxed to the NRC by NMPC at the conclusion of the call.
Mr. Lois requested clarification of the sentence on page 7 of MPM-108679 that reads:
"The highest fluence at the shroud ID surface for this ligament is 4.18E+20 n/cm~." Dr. Manahan responded that "this ligament" refers to the ligament in vertical weld V-10 at the location 33.33 inches below horizontal weld H-4, as also shown in Table 2-3 of the report.
Sincereiy, ORIGINAL SIGNED BY:
Docket No. 50-220 Darl S. Hood, Senior Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Enclosure:
Faxed page from Report MPM-108679 ccw/encl: See next page DISTRIBUTION:
See next page 98ii020240 98i028 PDR ADQCK 05000220 P
PDR DOCUMENT NAME: G:>NMP1>FLUENCE.TEL To receive a copy ofthis document, indicate in the box: "C" = Copy without attachment/enclosure "E" = Copy with attachment/enclosure "N"= No co OFFICE PM:PDI-1 NAME DMood/rsl 5
DATE 1D/
/98 E
LA:PDI-1 SLI i 10/
98 D:PDI-1 SBe Me 1D/
98 Official Record Copy
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.c. 2055&4001 October 28, 1998 LICENSEE: Niagara Mohawk Power Corporation FACILITY:
Nine Mile Point Nuclear Station Unit No. 1
SUBJECT:
SUMMARY
OF TELEPHONE CONVERSATION OF. OCTOBER 28, 1998, ON CORE SHROUD NEUTRON TRANSPORT AND UNCERTAINTYANALYSIS REPORT MPM-108679 (TAC NO. M99720)
On October 28, 1998, Mr. Lambros Lois of the NRC staff participated in a telephone conference call with Niagara Mohawk Power Corporation (NMPC) and an NMPC contractor, Dr. Manahan, to discuss a sentence in Report Number MPM-108679, "Nine Mile Point Unit 1 Shroud Neutron Transport and Uncertainty Analysis," forwarded to the NRC under NMPC's cover letter dated October 22, 1998.
Participants for NMPC were Messrs. G. Inch and A. Abbasi. The enclosure, which shows the clarification provided during this conversation, was faxed to the NRC by NMPC at the conclusion of the call.
Mr. Lois requested clarification of the sentence on page 7 of MPM-108679 that reads:
"The highest fluence at the shroud ID surface for this ligament is 4.18E+20 n/cm'." Dr. Manahan responded that "this ligament refers to the ligament in vertical weld V-10 at the location 33.33 inches below horizontal weld H-4, as also shown in Table 2-3 of the report.
Sincerely, p~x/~
Darl S. Hood, Senior Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket No. 50-220
Enclosure:
Faxed page from Report MPM-108679 ccw/encl:
See next page
C t
Niagara Mohawk Power Corporation CC:
Nine Mile Point Nuclear Station Unit No. 1 Mr. John H. Mueller Chief Nuclear Officer Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Operations Building, Second Floor P.O. Box 63 Lycoming, NY 13093 Regional Administrator, Region I
U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mark J. Wetterhahn, Esquire Winston 8 Strawn 1400 L Street, NW Washington, DC 20005-3502 Resident Inspector
. U.S. Nuclear Regulatory Commission P.O. Box 126 Lycoming, NY 13093 Charles Donaldson, Esquire Assistant Attorney General New York Department of Law 120 Broadway New York, NY 10271 Mr. Paul D. Eddy State of New York Department of Public Service Power Division, System Operations 3 Empire State Plaza Albany, NY 12223 Supervisor Town of Scriba Route 8, Box 382 Oswego, NY 13126 Gary D. Wilson, Esquire Niagara Mohawk Power Corporation 300 Erie Boulevard West
- Syracuse, NY 13202 Mr. F. William Valentino, President New York State Energy, Research, and Development. Authority Corporate Plaza West 286 Washington Avenue Extension Albany, NY 12203-6399
DISTRIBUTION:
~Hard Co Docket File PUBLIC PDI-1 Reading OGC ACRS E-Mail S. Collins/F. Miraglia B. Boger J. Zwolinski S. Bajwa D. Hood S. Little G. Lainas R. Caruso L. Lois W. Koo C. Cowgill, Rl T. Collins
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- OCT 2B SB WED 01 l26 PM HSING I
'I FRX HO, 34S1400 Ll Y NlAGARA E% u MOHAWK P.
01 NINE MILE POINT NUCLEAR STATION P.O. BOX 63, LYCOMING, NEW YORK 13093 FAX COVER LETTER NINE MILE POINT UNIT 2 FROM:
FAX TELEPHONE NUMBER:
(315) 349-1400 NAME:
DEPARTMENT'ICENSING/ENVIRONMENTAL TELEPHONE NUMBER:
TO FAX 4
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TOTAL NUMBER OF PAGES FAXED (INCLUDINGCOVER LETTER).'
'ATE:
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MESSAGE:
Enclosure
P.
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@001 OCT-28-98 WED 01:30 PN L
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01/01 Pfpzzzticular zntezcst zs the maxnnum Suence to the shroud wclds. Thc axposuzo t 8
otal wclds aad two vertica! wc!dr is g!venin Tehlc2-2. Wczudtal localion, height, end 0
nriznuth for each weM znazdmuzn cxposuzo js given. The 8ucnce is cvaiuszed for the end of'ycle I2 and thc projected equi ofCycle 13 (14500 hours atter thc cad ofCycle 12). For the weld loootionsaboveandbelowthecozezcgicn(H1,86A BbB acd H7) the 1
~
e Fau n
ClcuntZO no zaclu escczncmca! details orexhadlarenoughto dezcrzninc the Jlucnccto dzeso points directly &unthc transport model. Thc values glvezz azc cstunctes based oa cwtapolntiott ofthe fluxthrough additional water. For thziHl weld, tbis zczzzcpolzuloa is very uaceztaitt due to wacr nzbzinS in this region and a resultant u certain vofd &zction. Aconsczvzzzivc void'fraction of0.7 %%8 used to oxtzapohte the flucucc.
Two other points ofinterest are welds V9 end Vl0az pzuents 6 laches aboye weld HS and 6 lnehos below weld 84 (locations ofJlyancazs czcditcd in the structural ana)ysls), Thc flucncc at those paints is aQcu)ated to be 2.677E+20 azd 3.60K+20 ale~ (B> 1 MoV),xrsp~vely, at 3.974P+20 zz/om'.
tito end ofCycle 12. AtOic cad ofCyclo 13 these values increase to 2,941B+20 n/
z d
c 0
~
+
czzl an vlo c Ffo~~
J~~ocg 3 g ag gg/ctM Hp C H(~F/Fe d4rF, ~~a Fj Io/itlf'P cI~Iy th ptQkflQcncepo tN bout/9 ~~ f~wgd zLndHS QrotabulntejiaAppe d-ApphQoa nfthe tzazzzpozt calcuhtfoazcsultsto the Cycle 13 structural asscssznezzt shows tlzat the peals Quince to the V9~ V10rcmaimzzg iigameata villnot exceed 5.0 8+20 n/an at l4,500 EFPH past tho cad ofoyclo 12. Table 2-3 summzuizes the V9/V10 axial Sucacc data for tho rezzzainJnlt Iignnmatc vrhicb are being &aaIyzod ia the structural Integri'nalys~ 49 showzt lnW table, azuLlysis ofthc liaezzzcnts adjacent to H4 showers that weld V9 is lizaiting in tcrzns ofI!uence because itextends further down kom H4 than docs tha weld V10 Hpuncnt. The V10 teznalaie8 ligamozzt which gene thc ftze}midpl e
~hi hcstQzu;aug o alloft'9 an4Y10 li chi il or
'gamemiaal+IF' ea esliauucd once*mao ATaaKBRloQm mean best estimate fluence, the reauhing peak fluence of4,Q +20 a/cm is below 5.0 E+20 n/czn'hrough tbc cad ofCycle 13.
2,4 Chayter' References
[2-I]
RSICC Cozzzputer Code Collcchon, CCC-54:1, TORT-DORT-PQ, Two-and Thrcc-Safe Jaf mensioaal Discrete Ordlnetcs Tznnspozt Version 2 7.3 zLihbh. 6o th Rndi
., av m
e azzon TN, lane 1996.
sty z
ozzzzabon Computational ~, Oalz R'd~ ¹hounl Labozat Oak Rid
- ozy, go,
[2-23 RSCCC Data Dbzary Ca!lect!one DLC-]85, BUGL&96,Coupled 47 Neutron, 20 Gamma, Ray Group Cross Section Ubzazy Derived from ENDP/B-VIforL%R SizzcM and ctry pplzcazions. avaihzb1c &am the Rzzdizzrzon Safety information Prcssure Vessel Dosizn A
or c
mg azzzputatlonal Center, Oak Ridge National LzLhozatozy, Oak Ridllc,TN, March l996.
P~ge A'ember 7 10/28/9& II;08 TXPX N0.3154 P.OOI
~ 'l A