ML20084M135
| ML20084M135 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 05/10/1984 |
| From: | Drey K AFFILIATION NOT ASSIGNED |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8405150222 | |
| Download: ML20084M135 (1) | |
Text
r W
Mrs. Leo Drey,
515 West Point Avenue Universsey City, MO 63130 May 10, 1984 Mr.. Harold Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555
Dear Mr. Denton:
Would you please explain to me on what bases the Nuclear Regulatory Commission staff determines which critical, safety-related component and piping system welds need not be inspected -
that is, which ASE code inspections may be waived? As an example, the enclosed letter to you of March 26, 1984, from St&JPPS regarding the top circumferential weld in the reactor pressure v'essel closure head is apparently one of a series of requests for relief from code requirements at the Callaway plant. Apparently Union Electric is asking to be relieved from certain inspections both
~
before and after the reactor becomes operative (that is, some preservice and some inservice inspections).
I am reminded of the surprise I experienced upon;1 earning that the NRC staff had permitted Commonwealth Edison to continue opera-ting Dresden Unit One in Illinois for the last five of its 19-year operating life even though certain critical welds were not able to be inspected. As you may remember, you had to waive. inspection requirements because the radiation fields near the reactor coolant pressure boundary -- the most critical part of the plant - were so hot that insoectors could not even go near the welds, let alone reomir ment At Callaway it looks like they're asking for your leniency before they even get going.
Sincerely, Aly Enc 1: Letter from S.J. Seiken, SNUPPS, dated 3/26/84 - SLNRC 84-0051 W
8405150222 840510 q
DRADOCK05000g8 y[
'/
7 o
ep I
-l SNUPPS standardised Nuclear Unit p
,et.ntsva*a' March 25, 1984 s em. en.,rv n
"*UNo* "
~3 SLNRC 84-0051 FILE: 0541/M-139 SUBJ:
Preservice Inspection Relief Recuest - Callaway Plant j
)
Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S.. Nuclear Regulatory Commission Washington, D.C. 20555 Docket Nos. STN 50 482 and STN 50-483 Ref:.SLNRC 84-0036, dtd. 2/24/84: Subj. as'Above
Dear Mr. Denton:
The reference letter forwarded a partial relief request from preservice examination requirements for a number of component and piping system welcs in Callaway Plant. The purpose of this letter is to advise NRC of an additional component weld requiring relief from ASME Section XI examina-(
tion requirements.
Specific data in support of this request are as follows:
System:
Reactor Pressure Vessel Category:
8-A Component
Description:
Top circuinferential weld in the RPV Closure Head, I.O. 2-CH-103-101 Code Requirement:
Volumetric examination from both sides of weld per ASME Section XI, 1977 Edition, Summer 1978 Addenda
~
Areas for Relief:
35% of total weld volume Ba is for Relief:
Control Rod Drive mechanism penetrations, three lifting lugs welded directly onto 2-CH-103-101, and obstructing closure 5eac shrouding,-preclude complete volumetric examination.
Removal of closure head shroud during ISI will require 500 manneurs of effort, presenting considerable ALARA concerns and still would not permit cceplete weld coverage, b
Alternate Testing:
None; Accept as is
$5h
-- -A _
g.
0 a
=
N
SL!RC 34-0051 Page So-The a' cve relief recues: 43s ciscusse'd via telec:n with NRC (Hum, o
Holonich) on Maren 9. 1984'sno the infersstien proviced herein is a result'of this telecon.
If additional information is needed in suppcet of-this request, pl. ease contact the uridersigned.
Very truly yours,
~ (
/
3 _,t..h...:
. Seiken, Manager Quality Assurance
. SJS/cck/3a2 cc:
J. Neisler/B. Lfttle,;UShAC/ CAL W. Schun/K. Whittlesay, USkRC/WC J.' Konklin, USNRC Region.III G. LJ Koester, KGE 0~. T. McPhee, KCPL
- 0. F. Schnell, UE.
If
~
-y te l
1 i
r f-ll t
..a
.