ML20062K229
| ML20062K229 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 11/19/1980 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8012030658 | |
| Download: ML20062K229 (4) | |
Text
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- B ALTIMORE G AS AND ELECTRIC COMPANY P.O. B O X 147s O Al TIM OR E. M A R YL A N D 21203 AnfMun C. LumovaLL,Jm.
v,c a e.a s ce =f
- fovember lo, 1080 se-Office of Nuclear Reactor Regulation U.S. 7uclesr 'tegulatoryCommission
- ashington, D. C.
20555 A""Z:i"IC l:
"r. Pohert
't. Reid, Chief Operatina Reactors Bra. ::h 1h Division of Crerating..eactors O'JF.~C" : Calvert Clif*s 'fuelear Power "?lant's Unit 70s.1 and 2, Deckat Nep 6 -317 and 50-318
" : rocram Nemtest In ervice %nspection "or Relie" erc: -*h Code Ceetion XI Reauirements Seternined "o Be Inoractical 9asr ?'.r.
"eid :
In secordance rith 10 C7R 50.55a(c)(6)(1), we recuest the Comission to Frant an additienal exanntion from an E'C Code Section XI recuirement that hss been de-tar.ined to ke impractical.
In accordance $ritu :T"C Utaff Guidance, letter dated 1ovember 2h,1976, the information concerninc the exenution recuest is tresented Serein.
It has been determined that hydrostatic nressure testine, for retairs, modifica-tions, replacements, additions, and alteratior.s in some instances is imoracticsl:
specifically, the hydrostatic pressure testing of Class 2 mrtions of steam and feedvater systens thst cannot be isolated from the secondary side of the steam cenarators and are five (5) inches nominal pipe sise and snaller.
"he Code of 'ederal Berulations, Section 10 CvR 50.55a, invokes C?C Code Section
?C for the inspection and testinc of operatinc nuclear facilities. Calvert Cliffs r lic r the rules and reculations of ASTC Code Section Units 1 and 2 are recuired to o
XI 107h "dition vith Addenda through Su=ner 1075 for Class 1, 2, and 3 piping and ecmuonents. Subarticle D7A h?l0 in this Code recuires the rerfornance of a pressura test in accordance with the provisions of D7A-50% following velding on the pressure retaining boundary. Article IUC-5000 recuires that the hydrostatic pressure test he at least 1.25 times the system design pressure for Class 2 pressure boundaries.
Calvert Cliffs Steam "enerators are limited by design to only ten (10) hydrostatic cressure tests on the secondary side.
"ro (2) hydrostatic pressure tests have been perfor:ed on the secondary side of the steam generators as of this date, kOCl s
Tm MCUFET C0;iTAWS i
__'E QUAUTY PAGES PO
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1 Office of :Iuelear Peactor Regulation 'Tovember 1980 "our additional hydrostatic pressure tests vill be reeuired to meet the once per inter /sl ICI requirenents over the forty (LO) year life o' the nlant. "' hie leaves 3
only four (4) pressure testinc cycles per stean renerstor reserved for testine sfter repairinr and making nev velds on the secondarf pressure boundarv.
I It is nromsed that repair velds and nev velds on pininr and connonents that are "ive (5) inches nominal nipe sise and smaller snd cannot be isolated " rom the secondary side o* the steam trenerstors ha examined undar nor-ttl onerstine cressure vhich corresponds vith 100 rated reactor never in lieu of hydrostatic nressure i
testine in accordance vith A:P?2 Code rection H.
As an added renuirenert for velds axemnted from hydrostatie nressure testing requirements, a surface examinntion shall he nerfor-ed n*ter comnletine renoval of half of the first veld 1syer by Prinding.
f.nother surfsee exam vill be nerfor ed after the #inal veld ness.
- also, a 1905 volumetric exam of comnleted hutt valds on branch cennections and associated ninine and co=nonents greater than one (1) inch noninsi pi e nise vill ke ner"or-ad, a,'?'2 c de Cection XI recuire:nents, vill insure
!t is "elt that these, in lieu c e o
i the interrity o' the connonents recuea.ted for exemntier " rom the hydrostatie pressure I
testine reautrenents.
j E tabulation of the infor.ation reauirnd "er this reauest of ralief fron "" Code "aetten r re-uirements, determined to be imnractical, in prese,ted Salev.
"omnonants for W.ij _h N11ef Ts Deauested:
1 A.
'fama -and 'Innber--
Portions o* the stesm and feedvater syntams extending from, but not includinc, the secondarf side o' steam generstors 11, 12, 21, and 22, up to and in-cludinc, the first outar::ost containment isolaticn valve that is either normally closed or canable of autonstic closure during all modes of normal l
reactor operation. "' hose items involved are:
Pinine Line 'funber
'enerintion DP-1 feedvater Punn 91scharre to Otesn Generators 03-3 "cedvater Denetration Dipine E3-1
" sin Ctean to " sin Utesm Isolstion "alves 23-5 Auxiliar/ Feed rater 2B-6 Gteam cenerator 31ovdovn Pining E3-12 "nin Ctean Penatration Pipine 23-13 Auxiliarv "eedvater Penetration "ininc E3-lh Cteam Generator 31ovdown Penetration Pipine l
I.
Office of "fuelaar Reactor Rerulation !!ovember lo, 1980 Pining,Line 'h2mber Descri tion 2
'!!scellaneous Associated Tnstrument Pine and ubine Connected to Cteam Generators and Peculatory Guide 1.26 Class ? Portions of f.bove Pinine Only recairs, modifications, replace-ents, additions or alteration to steam genera-tor associated pining that cannot te isolated from the steam generator and are five (5) inches and smaller in nominal pipe size are reauested for exemotion from the hydrontatic pressure testing requirements o* I'lC-53So prior to ba!nr, laced into 4
service.
"'his is not an exemntion from the interval recuirerrent of hydrostatic nressure testine of these comeonents, nor is it an exer.ption
- rom hydrostatic test-ine of direct steam generator pressure boundary veldinc.
3.
31eti en Fenove heat from the reactor coolant.
Ec_d_e Class of Exe-mtion *'eauest Portions C.
o f
Ptnine ' tne 'btmhar Ovirinal %ien rinns Par._qutde_1.2 Clan DB-1 331.1 2
DB-3 331.7 Class 2 2
23-1 331.1 2
E3-5 331.1 2
.3 #
B31.1 2
'G-12 331 7 Clasn 2 2
23-13 331 7 "1sss o 2
r3-lh 331.7 Class ?
2 II.
Aday,u_iremen_t_**=om '.'hich Felief Is Renuested :
AS!C Code Cection XI 197h Edition with Addenda through Cummer 1975 recuirement for hydrostatic pressure testing in accordance with Article I"C-5M" followine recairs, modifications, replacements, additions and alterations. "his reauire-ment has been determined to he imnractical for ccaponents five (5) inches and smaller in nominal pire size that ara not isolatable fron the secondarv side of the steam generators due to the limitation en the nunker of hydrostatic pressure tests allowed over the service life of the steam generators.
III. Cunco_ritne Infor-intion:
Calvert Cliffs Steam Generators are currently limited to eight (8) remaining hydrostatic pressure tents. :'our (h) hydrostatic tests vill be performed over the forty (h0) year life to meet tha once per interval reouired hydrostatic nressure test in accordance with ACI'E Code Section 7I recuire ents for Cisss 2 connonent s.
"'he remainine four (h) hydrostatic test will he reserved for re-pairs, modifications, replacements, additions, and alterstions not being recuested for exemntion as snecified herein.
i Office of Unclear Peactor Perulstion h-
?iovenber 19, 1989 IV.
In Lieu Oe Testine:
A.
"xamination of the connonents under norral oterating nressure corresoond- -
ing to l W rated reactor power.
3.
Surface examination ceetine AT? "oda Section TI requirements after conclet-int-removal of half the first veld layer by grindine. Surface examination vill he rerformed by the linuid penetrsnt method.
C.
Surfsce examination c.eetinc AS?C Code Cection XI reautrements after complet-ing the veld. Surface examination vill be performed by the licuid penetrant or marrnetic particle methods.
3.
Volur.etric axsnination en cocoonent butt tolds creater than nne (1) inch nominal nice size. Ultrasonic and/or radiocrachic examinstien methods vill be performed.
i
.*e ' ave discussed this exemtion renuent vith "r. " *nie Jerniran from the Office o** Inspaction and Enforcement, Pacion I, and trith "r.
Palph Architzel, our resident
'I'C insnector.
Chould you have any further nuestions concerning thic cuh. ject, clease do not hesitate 1
to contact us.
"erv truly yours,
A. E. Lundvall,.Tr.
j Vice President - Su7ely A"L/seb
(
cc:
"e s s rs..T.
- 4. Biddison,.Tr., Esnuire t',. F. Trowbridge, Esquire E. L. Conner,.Tr. (:00)
E. Jerniran, IGC (Eine of Pruscia)
R. Architzel, 'TP.C (Calvart Cliffs)
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