ML20148G914
| ML20148G914 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 01/12/1988 |
| From: | Mcbrearty R, Strosnider J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20148G907 | List: |
| References | |
| 50-245-87-35, GL-84-11, NUDOCS 8801270062 | |
| Download: ML20148G914 (3) | |
See also: IR 05000245/1987035
Text
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O.S. NUCLEAR REGULATORY COMMISSION
REGION I
Report No.
50-245/87-35
Docket No.
50-245
License No. OPR-21
Priority
--
Category
C
Licensee: Northeast Nuclear Energy Company
P.O. Box 270
Hartford, Connecticut 06141-0270
Facility Name: Millstone Nuclear Power Station, Unit 1
Inspection At: Waterford, Connecticut
Inspection Conducted: December 14-18, 1987
Inspector:
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R.-A. McBrearty, Reactor
ineer
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Approved by:
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J. R. Strosnider, Chief, Materials & Processes
date
Section, EB, DRS.
Inspection Summary:
Inspection on December 14-18, 1987 (Inspection Report
No. 50-245/87-35)
Areas Inspected: A routine announced inspection was conducted by one regional
based inspector of the licensee's response to Generic Letter 84-11.
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Results: No violations were identified.
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8801270062 880114
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ADOCK 05000245
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DETAILS
1.
Persons Contacted
D.-Cleary, Engineer
- J. Leason, ISI Coordinator
J. Nowell, Shift Supervisor
- J. Stetz, Station Superintendent
- R. West, ISI Coordinator
D. Wilkens, Chemistry Supervisor
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U.S. Nuclear Regulatory Commission
- M. Conner, Project Engineer
- Denotes those present at-the exit meeting.
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2.
Licensee Response to Generic Letter 84-11
Because of occurrences throughout the industry of intergranular stress
corrosion _ cracking (IGSCC) of BWR recirculation system and associated
piping ande.in response to NRC IE Bulletins, the licensee has established
an inspection program for early detection of IGSCC at Millstone Unit 1.
The licensee's program has been updated periodically to comply with
revised examination and _ personnel qualification requirements.
The
. licensee's actions up to and including-the 1987 refueling outage are
discussed in Inspection Report No. 50-245/87-16.
Subsequent to the establishment of'the licensee's 1987 inspection program
a draft NRC Generic Letter associated with NUREG-0313, Revision 2 was
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proposed to provide revised NRC staff positions on IGSCC in BWR austenitic
stainless steel piping. When this Generic Letter is issued it will
supersede Generic Letter 84-11.
.The inspector reviewed licensee records to ascertain compliance with
Generic Letter 84-11, and to determine to what extent the licensee has
applied in its program the guidelines of NUREG-0313, Revision 2 and the
associated draft Generic Letter.
The following were included in the-
inspector's review:
Updated inspection program summary - based on 1987 refueling outage
examination results
Computer listing of welds - based on updated summary
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Updated inspection summary - based on draft Generic Letter guidelines
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Computer listing of welds - based on draft Generic Letter
Computer listing of welds to which stress improvement and/or overlay
repair was applied
Computer listing of welds identifying weld and piping materials and
the associated ISI isometric drawing number
Marked up system ISI isometric drawings identifying original and new
welds which are in the IGSCC program
The inspector found that the licensee's IGSCC program has been updated to
incorporate the new guidelines of the draft Generic Letter. The licensee
has included in its program Table 1 of NUREG-0313, Revision 2 which
categorizes welds and provides an inspection schedule based on the type
of material and the various processes to which the welds may have been
subjected.
In some instances the licensee has established subcategories
to accommodate specific plant conditions.
The licensee's computer based
IGSCC program can be readily updated to reflect revised NRC requirements
and current program status.
The staff position on leak detection, as defined by the NUREG and the
draft Generic Letter, is incorporated in the facility Technical Specification (TS) 6.3, and in operating procedures which are more
restrictive than the TS regarding frequency of monitoring.
The water chemistry in use at the facility is based on the guidelines
established by the BWR Owners Group but is more restrictive.
water chemistry is being considered by the licensee and a short term
pilot program has been completed at the site. The results are being
evaluated at this time.
No violations were identified.
3.
Exit Meeting
The inspector met with licensee representatives, denoted in paragraph 1,
at the conclusion of the inspection on December 18, 1987.
The inspector
summarized the purpose and the scope of the inspection and the findings.
At no time during this inspection was written material provided by the
inspector to the licensee.
The licensee representatives did not indicate
that this inspection involved any proprietary information.