ML19263D329
| ML19263D329 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 03/20/1979 |
| From: | Gilleland J TENNESSEE VALLEY AUTHORITY |
| To: | Ippolito T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7903270465 | |
| Download: ML19263D329 (16) | |
Text
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TENNESSEE VALLEY AUTHORITY CH ArTANCOG A. TENNESSEE 37401 500C Chestnut Street Tower II ggR 201979 Director of Nuclear Reactor Regulation Attenticn:
Mr. Thomas A. Ippolito, Chief Branch h 3
Division cf Operating Reactors U.S. Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Ippolito:
In the Matter of the
)
Docket No. 50-259 Tennessee Valley Authority
)
Enclosed is the proposed hydrostatic pressure testing program for Browns Ferry Nuclear Plant unit 1 written to the 1974 Edition, Su=mer 1975 Addenda of Section XI of the ASME Boiler and Pressure Vessel Code. Enclosure 1 is a list of the systems to be pressure tested. Enclosure 2 consists of the requests for relief from ASME code requirements submitted for NRC review pursuant to 10 CFR Part 50, section 50.55a(g)(5)(111).
The inspection cycle for which the enclosed program is proposed begins on June 1, 1979. Significant delay in receipt of your approval of the test program and the associated revisions to the technical specifications beyond the start of the inspection cycle creates undue hardship on plant operation and test performance. To avoid this hardship, we would appreciate completion of your review of the program and issuance of a ruling by September 1, 1979.
If your ruling has not been received by this date, time constraints force us to assume we have your staff's interim approval of our hydrostatic pressure testing program as proposed in the enclosure and will prepare test procedures accordingly.
If we can be of any assistance in expediting your review please let us know.
Very truly yours,
~[ep3 'Ts,,
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,.c 1 J. E. Gilleland Assistant Manager of Power Enclosures
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7903270465 is
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An E:uai cocertunity Employer
Enc'osure 1 This table lists the systems to be pressure tested in accordance with ASME Section XI, Articles Ik'A-5000, 1%~d-5000, IWC-5000, and IWD-5000.
The tabulation identifies Systems, Code Class, drawings, and specific references to Code Sections for test requirements.
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Test 3esJire ents Ite 'e r e nc e d OMc 3rsutres Class T.*3 4219(a)
T43 ',219(o)
IWC-5000 T r~.2 ' i ?,'. '
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Test _
Systems X
7 IL"CI h7i9t?-1 2
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17#313-1 2
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9 Itictsu hTWS58-1 3
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i ated portions or L7Vth)-2 ItC's leTti%'s -2 L71/lYd-7 DfD-5219(a) to a system leakage test perforced prior to startup fo11ovin6 halts:
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each refueltn6 and as required by mntntenance, g
Ti!! '>219(b) is a syste:i hydrostatic pressure test perforvri st 10 year i
2 intervals and as required by motntenance.
IUC-5900 is a system hydrostatic pressure test performt at 10 year 3.
intervals, to be scheduled at vnrtoun ticw s tr. the triterval for the j
various systems in accordance utth 1U0 28e12 and no requirect by t
ratntenance, TJD-2410(b) is a syste:i hydrostatic pressure test perforgd at 10 year h.
interuts and as required by mainter.snee.
IVD.2410(c) is a system lenkode test performed within every ene-third 5.
of an inspection interval (one-third of ten years).
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__ consists of Requests for Relief from various portions of ASME Section XI Subsections IWA, IWB, IWC, and IWD, as they apply to system prersure tests. Relief requests are numbered H(Hydrostatic)
-1 through -11.
s REQUEST FOR RELIEF W.1
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SYSTD4 -
All Systems CLASS -
1, 2, and 3 T!3T BEQUIRDENT - Qualified inspector in accordance with IVA-2130.
BASIS FCR RELIET - Present TVA policy is to prod de its own inspectico services. TVA is a federal agen:y and, as other federal agencies, acts as its own inspector and is not subject to state or other non-federal inspectors.
ALTUUtATE TESTING - TVA vill provide its own indep=sdent review of the Section II program throu6h its esotral office staff in Chattazzocga.
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RTCUEOT FG1 PELIL7 H.2 T.TJTFM -
All Syatema CIASS -
1,2,3 e
T)3T flEQUIRDE:Tf -
Paintaining test pressure and te perature for four hours prior to exanination per To-5210(a).
MSIS FUt RELIIT -
1977 Edition of Section XI. Article Ida-5000, a11cvs pressure and temperature to be raintained for 10 minutes prier to examination en exposed pipir4 ALTERNATE TESTUG - Expesed pipin6 vill be maintained at pressure and temperature for to minutes bercre beginntra examiratien.
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ItiUtEST FOR IF.I.II.P 11-3 ftY",T121 -
Ibin St.een bef%d out.-board !GIV; stene to Reacter f eed Pump Turbine.. S.JAE, Orf-Gas Prehenter: Ccre f1 prey (high prenove pipins downstresn or FC7 75 23 and FCV 75-51); P!F1 (htch presoure piping downstrese.
or FCV Th-52 and PW Th G6); ICTCI (pipine, devnstreon of FCV 73 kk); RCIC (pipins; devnetream of FCV 71-39),
CTASS -
2 TCT P1QUIIWJEIT -
Hydro at 1.25 x Desic,n Pressure MSIS FCR RELIET -
This pipinc **ill be *.ested at the car.e time es the hydro fo?' the Class 1 iMnct.'r 'lessel and assoctoted pipir.g, due to valve locatiens and insufficient test connections to test to higher pressures.
ALTEICIATI' TCTDR; - Hydro test, with reactor s-essel, at 1020 cr 10' 0 psig, 4
dependent on vessel temperature.
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REQU13T PCR PJJEF 11 b S r.T m -
Standby Liquid Centrot, Core Spray. CRD Hydraulic System, RIIR, KPCI RCIC CTASS -
2 TFST 11MtmlDOiT -
Maintainin6 test temperatures at lOOD per IWC-$220(a)
IMSIS FOR RELIFF -
Standby Liquid Control, Core Spray, HPCI, and RCIC are tested only at 10% of the pressure seen during pericrite surveillance testing, per IVC-5220(e), and as such are not subject to brittle fracture at those pressures.
CBD and PHR pipinc will be run at eccentially ambient temperatures (approx. 80-850F) and are not sitbject to fracture at this temperature. Testinr, at this temperature, however, 0
la more stringent than testing at 173 F and above.
ALD3tNATE USTDIG - Testing at ave 11able test temperatures as stated above.
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Prorp37 rm tm*.r.'r 115 SYSTTJi -
RhTISV CTAS3 -
3 TIST RSCIIDE:C."f -
Previding iselsti:n volve: r r buried pirinc snt cenducting a less Of press le test r:r c upeneat leakage.
DASIS TCil RET.'M -
':here are no installed conneet tc9s fer prov: lins, a 1,:s-of-pre:-'tre test On hurled piping. Alse. the dWnstress isolat ten valve (botterfly) en esen cection er buried pipe is not desir,ned ter mini =al lenker,c to conduct this type Of test.
l AT.nat :AU. 'nSfDG - This piping h:: veter Flev and pressure fer lon6 prims of tice durinq cell shutlevns. Anj suestantial leaksge in buried pipin6 would be evidenced at this ti=e.
Also, the pressure te:t T r this piping is perfere:ed by deedheadins an MR3V puep. Tre pu p not develepir.4 at er nest dest;;n des 4 hest pres:u.re e?214 indlested lesking pipine,. A ls o, pum;* testing requirr4 by Subsection TaF of the Code would identify substen:1cl leskoge based en degradatien of pu p perferrance en two dirrerent pu=ps supplying the same pipin6 (Al and 42, El ar.d 22, C1 and C2, DL and C2).
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I REOUEST I'CR RELIE7 ft.6 f1ETD21 -
EECW el. G -
3 Tt:T RG UIRS CIT -
Providinc isolati:n nives fer buried pipinc and conducting a less of pressure test for ecaponent leakase.
EASIS FCn RELIEJ -
The devnstreso toelation valve (butterfly) en each sectien of buried pipe is not deotgned rer minical leaka6e to cenduct this type of test.
Y ALTEPJtATE TESTUG-This pipir4 has water flew and pressure et s11 times durin6 normi :persti:n. Any substantial leskase in buried pipin6 would be evidenced at tain ti=e.
- Alsc, the pressure test fer this pipirs. is perferred by deadheadir.g an EECV pump. The puep net devel: ping at er near design desdhead pressure would indicate teak.
int. pipin6 A180 pump testira required by Subsectico IkT of the Code v:uld identity substantial leakage based en degradstien of pu p perferrance en two diffe-i rent purnps supplying the so e piping (A3 and c3. B3 and D3).
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tiECUEST FCit IIF.T.IEF H-7 SYSTEM -
MRSW (Lew Pressure Piping Only)
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TLTT EQUIRCUT -
Gystem test pressure et 1.10 x design pressure.
MSIS FQt RELIEF -
There are no suitable tect connections rer installing a hydro pump to pressurize to 1.10 r desia.n pressure.
Also, to do this tectifs, both pumps supplyinc. a header woulri hsve to be isolated. This to not acceptable in accordance wit!- Technical Specifiestien h 5.C.2 ALTEMATE TESTD;G - Piping will be tested et the dead-head pressure of one Rl[RSW pump.
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IWt1EST rct ICLEF H e SYSTD1 -
EECW CtAS3-3 e
TCGT ItUlUIRD C T -
System test pressure at 1.13 x des!Gn pressure.
1%STS FOR RELIEF -
There are not suitable test conneett:ns fer instellicc a hydro pump to pressucite to 1.10 x design pressure.
In addition, there is no restulated event that could cause overprescuritatten of this piptr4 except for massive tube failure of an RXR Pump Seal Hest Exchancer.
ALTERNATE TESTING - Pipinc will be tested at the dead-head pressure of cne EECV pump.
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IWJLTST FQ1 ELTdF 11-9 e
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IItiro testine, or short sections or pipitw, to/from the rollowin6 c eponents:
Control Bay Chillers - Between:
3-67-763 & 3 67-765 3-67-770 & 3-67-772 -
Unit 3 Diesels -
Det.een:
3-67-6c2 & 3 67-6'6 3 67-701 & 3-67-704 3 67-712 & 3-67-716 3-67-721 & 3-67-72h BASIS PCR RET.TEF -
The Control Bey Chillers are not esrety related equipment, and the EEC'4 serves enly as an alternate heat sink for the Chiller Cendencer. There is no voy to postulate overpreset ritation of this pipir.q.
Due to the valvin6 arran6ement there is no practical vay to test this piping. The piping to the Diesels I
can't be practically tested withcut renoving 11 rouc. diesels frem service at the sar.c time, whic. violates Technicsl Spectri-cations. There is no p;stulated event which could overpressurize this pipinC.
ALTEIU:AT:': TCTI C - None G
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REQUEST FOR RELIEF H-10 SYSTEM
- All systems CIAt" 1,2,3 TEST REQUIREMENT Pressure tests following repair to components in accordance with IRA-4210 EASIS FOR RELIEF - Performance of a hydrostatic pressure test af ter minor r: jairs by welding is unnecessary. An in-crease in tha level of safety of the compenent is not realized. In addition, other nondes tructive tests (PT, UT, etc.), if applicable, shall ba employed in a case-by-case basis in accordance with documented TVA repair procedures which are main-tained by a QA program in accordance with IWA-4100(b).
ALTERNATE TESTING - The guidelines set forth in IWA-4400 of the 1977 Edition, Summer 1978 Addenda of Section XI, shall be followed. Components which require repairs as a result of a pressure test shall be pressure-tested.
The reactor pressure vessel shall remain under the guidelines set forth in IWA-4210 of the 1974 Edition, Summer 1975 Addenda of Section XI.
a REOUEST FOR RELIEF H-ll SYSTEM
- All systems 1
CLASS Pressure tests following repair to components TEST REQUIREMENT which cannot be isolated from the reactor vessel, IWA-4400 of the 1977 Edition, Summer 1978 Addenda.
RASIS FOR RELIEF - Performance of a hydrostatic pressure test on components, following repairs by welding, shich cannot be isolated from the reactor vessel is impractical. This would involve pressure test-ing dhe reacter vessel and all portions of Class 1 piping.
ALTERNATE TESTING - The component will be leak-tested in accordance with IWA-5000 and IWB-5221.
_.