ML20084L030
| ML20084L030 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 04/27/1984 |
| From: | Devincentis J PUBLIC SERVICE CO. OF NEW HAMPSHIRE, YANKEE ATOMIC ELECTRIC CO. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| SBN-649, NUDOCS 8405140309 | |
| Download: ML20084L030 (3) | |
Text
,_.
\\.
m ano m sTA m IPUBLIC SERVICE Engineedng Offke:
Company of New Hampshire 1671 Worcester Road Framinoham, Mossochusetts 01701 (617). 872 - 8100 April 27, 1984 SBN-649 T.F. Q2.2.2 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 Attention:
Mr. Richard W. Starostecki, Director Division of Project and Resident Programs
References:
(a) Construction Permits CPPR-135 and CPPR-136, Docket Nos. 50-443 and 50-444 (b) Telecon of March 26, 1984, A. L. Legendre (YAEC) to A. Cerne (NRC Region I)
(c) USNRC Letter, dated December 27, 1983, " Combined Inspection Nos. 50-443/83-17; 50-444/83-13", R. W. Starostecki to R. J. Harrison
Subject:
Interim 10CFR50.55(e) Report; Fuel Transfer Tube Seam Closure Welds
Dear Sir:
On March 26, 1984, we reported a 10CFR50.55(e) item to Region I
[ Reference (b)] regarding the potential for overstressing welds that join the expansion joint assemblies to the fuel transfer tube. The following information is being filed pursuant to the interim reporting provision of 10CFR50.55(e)(3).
A.
Description of Deficiency Overstressed welds on the fuel transfer tube expansion joint assembly were discovered during the follow-up evaluation on a FSAR deviation reported in Reference (c). The FSAR deviation concerned the existing fillet closure welds which join the encapsulation vessel expansion joints to the 16" diameter recirculation piping feeding the section of the Containment Spray and Residual lleat Removal pumps. These welds were not in accordance with ASME III Code Class 2, requiremen s.
The fillet welds were originally treated as the seam closure weld for a typical mechanical or electrical,,enetration assembly. However, the containment pressure boundarf extends to the expansion joint clo sure weld, thereby requiring the weld joint to be an ASME III, Code Class 2, full penetration weld per our FSAR commitment.
b }1 8405140309 040427 1
PDR ADOCK 05000443 I (g \\ '
S PDR
s-United Statso Nuclear Regulatory Ccamission April 27, 1984 7
' Attention:
Mr. Richard W. Starostecki Page 2
,A review was' performed to identify any other containment penetrations that also extend the containment pressure boundary and thus require. weld joints to comply with ASME III, Code Class 2.
The fuel transfer tube cas the only additional penetration that was identified as having fillet closure welds that would be considered as part of the containment pressure boundary.
1 The original fillet closure welds for both the encapsulation vessels and the fuel transfer tube were analyzed to determine whether a loss of containment or fuel pool pressure boundary integrity could have occurred. The fillet welds associated with the encapsulation vessels were analyzed at the design pressure of the encapsulation vessels. The fillet welds for the fuel transfer tube were analyzed at the containment internal design pressure on the containment side and for the fuel pool fluid pressure head on the Fuel Storage Building side.
The fillet welds for the encapsulation vessels were found capable to withstand the design pressure while remaining within Code limits, j
however, the fillet welds for the fuel transfer tube on both the Containment and Fuel Building sides had stresses in excess of Code limits. We determined that.this weld deficiency constituted a 4
reportable 10CFR50.55(e) condition.
B.
Analysis of Safety Implication A failure of the fillet weld on the fuel transfer tube could have 4
resulted in a loss of containment or fuel pool pressure boundary integrity.
C.
Corrective Action Taken The sean closure welds for both the encapsulation tanks and the fuel transfer tube will be reworked to satisfy ASME III, Code Class 2, criteria.
The above corrective actions are scheduled to be completed by June.15, 1984. We will notify your office when the corrective action has been completed.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY s
y John DeVincentis Project Manager DJ/ds
- cc: Atomic Safety and Licensing Board Service List Director, Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555
1
- William S.-Jordan, III, Esquire Brentwood Board of Selectmen Barmon & Weiss RED Dalton Road 1725 I Street, N.W. Suite 506 Brentwood, New Hampshire 03833 Washington, DC 20006 l
Roy P. Lessy, Jr., Esquire
- 0ffice of the Executive Legal Director Edward F. Meany U.S. Nuclear Regulatory Commission Designated Representative uf Washington, DC 20555 the Town of Rye 155 Washington Road I
Robert A. Backus, Esquire Rye, NH 03870 116 Lowell Street P.O. Box 516 Calvin A. Canney kncehster, NH 03105 City k nager City Hall Philip Ahrens, Esquire 126 Dar.iel Street Assistant Attorney General Portsmouth, NH 03801 i
-Department of the Attorney General Augusta, ME 04333 Dana Bisbee, Esquire Assistant Attorney General l
_Mr. John B. Tanzer Office of the Attorney General Designated Representative of 206 State House Annex the Town of Hampton Concord, NH 03301
[
5 Morningside Drive l
Hampton, NH 03842 Anne Verge, Chairperson i
Board of Selectmen Roberta C. Fevear Town Hall Designated Representative of South Hampton, NH 03642
[
the Town of Hampton Falle
}
Drinkwater Road Patrick J. McKeon i
Hampton Falls, NH 03844 Selectmen's Office
[
10 Central Road i
Mrs. Sandra Gavutis Rye, NH 03670 Designated Representative of the Town of Kensington Carole F. Kagan, Esq.
RFD 1 Atomic Safety and Licensing Board Panel Eas. Xingston, NH 03827 U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Jo Ann Shotwell, Esquire Assistant Attorney General Mr. Angie h chiros Environmental Protection Eureau Chairman of the Board of Selectmen Department of.the Attorney General Town of Newbury I
One Ashburton Place, 19th Floor Newbury, MA 01950
{
Boston, MA 02108 Town Manager's Office Senator Gordon J. Humphrey Town Hall - Friend Street f
i U.S. Senate Amesbury, Ma..01913 l'
Washington, DC 20510 (Attn: -Tom Burack)
Senator Gordon J. Humphrey 1 Pillsbutf Street l
Diana P. Randall Concord, NH 03301 i
~70 Collins Street (Attn: Herb Boynton) k SEabrook, NH 03874
^
Richard E. Sullivan,' Mayor l
t Donald E. Chick City Hall Town knager Newburyport, MA 01950 Town of Exeter 10 Front Street Exeter, NH 03833 N
.. ~. - _. _.., _., _ _ _ _ _ _... _ _,.,. _ _ _ _ _ _..,... _ _. _ _ _ _ _
_ _.. _. _ _, _, _ __ _., _ _,. _. _ _ _. _ _ _., _ - _ _,,, _.,.,,, _,...,