ML20094D545
| ML20094D545 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 10/31/1995 |
| From: | Hagan R WOLF CREEK NUCLEAR OPERATING CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| ET-95-0117, ET-95-117, NUDOCS 9511060068 | |
| Download: ML20094D545 (3) | |
Text
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W@ NUCLEAR OPERATING LF CREEK Robert C. Hagan Vce Presdent Engineenng October 31, 1995 ET 95-0117 U.
S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-137 Washington, D.
C.
20555
Subject:
Docket 50-482: Request for Use of Code Case N-498-2 Gentlemen:
Pursuant to the provisions of 10 CFR 50. 5 5a (a) (3),
Wolf Creek Nuclear Operating Corporation (WCNOC) requests approval for use of ASME Section XI, Code Case N-498-2,
" Alternative Requirements for 10-Year System Hydrostatic Testing for Class 1,
2, and 3 Systems," at Wolf Creek Generating Station (WCGS).
Code Case N-498-2 was approved by ASME on June 9,
1995, and will be published in the 1995 Code Case Supplement No.
1.
Code Case N-498-2 has not yet been incorporated into Regulatory Guide 1.147 " Inservice Inspection Code Case Acceptability - ASME Section XI Division 1."
A pre-published copy of Code Case N-498-2 is attached for your convenience.
The NRC previously approved Code Case N-498-1 " Alternative Requirements for 10-Year System Hydrostatic Testing for Class 1,
2, and 3 Systems," for use at WCGS. Code Case N-498-1 provides for use of a system leakage test as an alternative for the required Section XI ten year system hydrostatic test.
Code Case N-498-2 eliminates the required four hour hold time for insulated systems and the ten minute hold time for non-insulated systems, which is required by Code Case N-498-1.
The revision to eliminate the hold times was approved by the ASME consensus process indicating the technical acceptability of Code Case N-498-2.
Approval of Code Case N-498-2 will reduce hardships during the eighth refueling outage and subsequent refueling outages.
WCNOC estimates the
. critica.1.. path. outage schedulo. would be reduced approximately two days.
In addition, running the Emergency Core Cooling System (ECCS) pumps for four hours, in recirculation, would be detrimental to the pumps. Installation of temporary pumps to maintain pressure for four hours would result in additional costs and additional radiological exposure and defeats part of the intent of Code Case N-498-1.
Code Case N-498-1 was written to eliminate the hardships associated with the performance of hydrostatic tests, part of which was the installation of temporary pumps.
9511060068 951031 PDR ADOCK 05000482 O
PDR P.O Box 411/ Burhngton. KS 66839 / Phone. (316) 364 8831
-/
(
An Equal Oppodunity Ernployer M.F'HC' VET 4
i0
3T 95-0117 o
Page 2 of 2 Removal of' the insulation from insulated components would reduce the necessary hold' time to ten minutes.
However, removal of insulation would also result in unnecessary costs and additional adiological exposure.
With approval of code c
Case N-498-2, insulation will not have to be removed and utilization of temporary pumps, to meet the four hour hold time, would not be required.
Approval for use of Code Case N-4 98-2 is requested by January 12, 1996, to support the refueling outage scheduled to begin in early March 1996.
If you have any questions concerning this matter, pleae.3 contact me at (316) 364-8831, extension 4553, or Mr. Richard D. Flannigan at extension 4500.
Very truly yours, k
Robert C. Hag n RCH/jra 1
Attachment cc:
L.
J.
Callan (NRC), w/a D.
F.
Kirsch (NRC), w/a J.
F.
Ringwald (NRC), w/a J.
C.
Stone (NRC), w/a
- - ~.
~
CASE
,s e
l N-498-2 4
i CA8E8 OF ARMS BOU2R AND PRE 85URE vssusL (Dot 1
Approval Date: June 9,1985
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$ae Nwnensel hdar for ausraden and any mannsou derna Case N49s-2 p)'Ibe boundary subject to tant, =-- _
j Akersative Requirements for 16. Year Sysensa dwing the system passere test shmal asund to d Cass l
Hydrostatic Testing for Oass 1,2 aM 3 Systens 2 ca pa=a== incinded in those pornas of syesus
)
lisation II, Division 1 requued to operage or support the saisty synum imamos i
g to and lacinding the Gest noemdy closed valu, lagidry: What abernatm raies may be used in lieu including a safety or relief valu, or valve capsida of of those requued by Sectme XI, Division 1, Table IWB.
autananc closure when the salsty fuochon is tegehed, j
2500-1, Categuy B-P, Table IWC2500-1, Lanegory C.
p) Prior a parfarnung the VT-2 visual esandas-H,andTableIWD.2500-1 CategoriesD-A,D-B,andD.
the, tbs syseem shall be preas=isal to nominal op-i C, as appbcabic, for the 10.ycar sysica hydrostanc test?
mting pressure. No hokhng time is aquired prior to j
perforadag the VT-2 visual asumimmen. The synsai j
Rgly:
shall be ma=amenait at acaussi operates presans during i
(a)It is the opmion of the 'annnin~ that as sa performance of the W-2 vimal -==='an r
i abernative to the 10 year system hydrostade test n.
(f) The W-2 visual esarnimanon shall lacinde au j
quind by Yable tws.25001, camoory n.r, en enona-a="r=== wiein the bonday iduHied la (bX2) ins ndes shd in used shove.
- 6) A system leakage test (IWB-5221) shall be (5) Test instrumsatmion mquusmenss of IWA-3 l
rnariw*st at or near the end af each ins l=+an
- derval, 5260 are act appinosbis.
y prior a sensa semp.
(c)It is as opinion of the Commines det, as as g)The boundary subject to test,
almramw to the 10 yar sysum hyibessne ten m.
j during the system leakage test shaB exased to as Class quimd by Table N2500-1[ategories D A, D 8, or g
)
1 passum ntaining componeem widtim the synce D C (D-B for the 1989 Edition with the 1991 and a
hamsday.
shagnese Addied.), m,phoeie, tim folio.ing mim shnu be med.
p) Prior to performag the VT 2 visual cuandna-tion, the system shall he pressurund to nomsmal op.
- 4) A syseeni passure test shall he conduand at 4
or meer the end of each inagweian fuhrval er during i
erattag pressure. No holding ties is regered prior to the ses inspecnon period of each impemon inerval penornung the W-2 visual ar-laa8Aan 'Ihe syss un emb -=.- a n eommaiapa mg dwing of Impecdo. Pagma s.
4l (2)h boundary suthed to tem r perfornianoe of the V!'-2 visual esandonnen.
duing the system passe test shall esmod to all cans (4) Test temperennes and pressues shan not ex-3 compoman incimial la them ponions d syens caed lindting eaanli+=am for the hydrosene test curve mpdad m opema or support the selety system fuseon i
as raataiaa'l in the plant Technical trae'Ac=ela -
9 m and % b But samaDy M win, p) % W.2 visual a--ar= shall incimie all i*'*8 * **1 '*3 3"' V' Pable of
,a=-
within the boundary identidal in (sXr y
assomatic clamus when the safety hection is aquired.
) Pdor to H -
- 5 the W 2 visual examma-(6) Tem imuninentiaa= w W IWA-8y#8'n 8W b 2
CP-5260 are tot appbcable.
ammspiumus.No ing dme is @ prie m (h) It la che npininn nf the (hmminne that, as an
~
ahernative to the 10-year synica hydrcatalic test re-shall be mH=*=n-i at==nia=1 opwating pecasme duing quired by Table IWC25(X).1, % C H. the h Performance of the W2 visual +==W W @ shd k g (d) % W-2 visual er===*an shall include all
- 0) A syswa passure tem shall be condused W
,,p,,,,,
within the boundary identified in (c)(2) or near the end of each inspeedon interval or during g
the same inspacnon paiod of each fanp-'laa inerva!
Q) Tem instrumentarian me ts of 1%A-of fa'P"elam Program B.
5260 m na W ic, 90 SUPP. t - NC Y EL.
Asse Nuclear comoonw. r ad. t' awe *, ' -.a
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