ML20003H996
| ML20003H996 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 05/04/1981 |
| From: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8105080304 | |
| Download: ML20003H996 (2) | |
Text
-
SOUTH CAROLINA ELECTRIC a GAS COMPANY Cotune A, Souin CAnounA asais J k Ik/
May 4, 1981 e(p\\
T. C. Nicuots.J n.
wei e.o..... s cuc~
=mu. omo..
w g
k'4 d
-1 %f bp!
Mr. James P. O'Reilly, Director
\\!Oi $
w U. S. Nuclear Regulatory Commission Q/
Region II, Suite 3100 yv ',
101 Marietta Street, N. W.
W6O Atlanta, Georgia 30303
Subject:
Virgil C. Summer Nuclear Station Docket No. 50/395 Reportable Significant Deficiency Incorrectly Specified and Installed Flange Material (80-25-14)
Nuclear Engineering File 3.1051
Dear Mr. O'Reilly:
On July 30, 1980, a final report was submitted on the subject significant deficiency.
In February 1981, during an NRC audit, it was brought to the attention of South Carolina Electric & Gas Company (SCE&G), Nuclear Engineering, by Mr. Bill Crowley, that corrective action to prevent recurrence had not been addressed. The purpose of this letter is to address that action.
l For the sake of clarity, the cause of this significant deficiency was the specification of type 304 stainless steel flanges in an application that required type 316 stainless steel flanges due to design pressure and temperature conditions of the associated systems. The incident occurred because in selecting mating flanges for 300 psi rated valves, the draftsman selected 300 psi rated flanges, which was allowed for t' is service, and using the desig_. m.:.ification specified type 304 stainless steel flanges. However, the vendor material specification, which allows 300 psi rated flanges, specified that type 316 stainless steel be used and this was not noted by the draftsman. Due to an engineering oversight, the error went uncorrected and the subject deficiency occurred.
SCE&G, Nuclear Engineering, has reviewed the subject significant deficiency with the Architect / Engineer, Gilbert Associates, Inc., and determined that the corrective action to prevent recurrence is to review with Drafting personnel the need to specifically obtain Engineering concurrence before using a component with a lesser pressure rating than the system in which it is being used and for Engineering personnel to be particularly attentive when reviewing and approving engineering documents. The subject occurrence is considered to have been an isolated incident and does not require any programmatic modifications or further corrective action.
l BO/'l l
s
/0 S "10508n y l
Mr. James P. O'Reilly May 4, 1981 Page Two The replacement of the type 304 stainless steel flanges with type 316 stain-less steel has been completed.
This letter is considered a final report on the subject significant deficiency.
If you have any questions on this matter, please call me.
Very truly yours,
/
T. C. Nichols, Jr.
MDQ:TCN:gib cc:
V. C. Summer G. H. Fischer T. C. Nichols, Jr.
O. W. Dixon, Jr.
C. A. Price D. A. Nauman W. A. Williams, Jr.
R. B. Clary A. R. Koon A. A. Smith H. N. Cyrus J. B. Knotts, Jr.
J. L. Skolds B. A. Bursey O. S. Bradham i
R. J. Sheldon
.s Document Management Branch (55e/21/LER Only)
I&E (Washington)
ISEG l
NPCF l
File PRS J. Ruoff l
l l
f 1
l l
l
__