IR 05000373/1979018
| ML19241B901 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 05/31/1979 |
| From: | Knop R, Neisler J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML19241B890 | List: |
| References | |
| 50-373-79-18, 50-374-79-12, NUDOCS 7907250301 | |
| Download: ML19241B901 (4) | |
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U.S.-NUCLEAP REGULATORY C0!P11SS10N OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
Report No. 50-373/79-18; 50-374/79-12 Docket No. 50-373; 50-374 License No. CPPR-99; CPPh-100 Licensee:
Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690 Facility Name:
La Salle County Station, Units 1 and 2 Inspection At:
La Salle Site, Marseilles, Illinois Inspection Conducted: May 15-16, 1979 Inspector:
John H. Neisler
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R. C. Knop,' Chief Projects Section Inspection Summary Inspection on May 15-16, 1979 (Report No. 50-373/79-18; 50-374/79-12)
Areas Inspected:
Work activities and quality assurance records relative to suppression pool modifications in Units 1 and 2.
Quality assurance records relative to the reactor recirculation system thermal sleeve / safe end modification on Unit 1.
Observation of activities relative to 1.ctnsee's investigation of lamination problems in steel plate in lower rrrtion of plant off gas stack.
Results:
Of the three areas inspected, no items of noncompliance were identified.
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DETAILS Persons Contacted Pcincipal Licensee (CECO) Employees
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T. Rose, Lead Structural Engineer T. E. Quaka, QA Supervisor
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L. Wood, QA Engineer
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H. Lautenbach, QA Structural Coordinator kl. J. Tapelle, QA Engineer
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J. Skoza, QA Engineer Contractor Personnel
- M. R. Daugherty, QA Supervisor, Walsh Construction Company
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T. Brinson, QA Engineer, General Electric Company
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J. Lowe, QC Supervisor, Genera! Electric Company F. A.
Lusch, QA Supervisor, Chicago Bridge & Iron W. H. Zimmer, Level II, CONAM hDenotes those personnel attending exit interview.
Program or Function Areas Inspected 1.
Laminations in_ Steel Plate Used in Lower Ring of Off gas Stack:
The inspector observed activities relative to licensee's investi-gation of lami nat ion problems in the ASTM A588 Grade B steel plate used to form the lower ring of the plat off gas stack.
The plate is being examined ultrasonically to determine extent of the laminations.
At the time of the inspection, laminations had been discovered in a fourfoot by six foot section of 1 1/4 inch thick plate in the lower corner of the south side of the first ring of the stack.
Licensee is continuing ultrasonic inspection of other portions of the stack.
This item was reported pursuant to 10 CFR 50.55(e) on May 8, 1979.
2.
Suppression Pool Modification: The inspector observed work activities and reviewed quality assurance records pertaining to the modifications being performed in the suppression pools in Units 1 and 2.
a.
The embed bolts for all plates in Unit 1 have been tensioned to 87 kips with the exception of one bolt on plate #2.
This bolt will be tested upon receipt of the specified nut for that bolt.
Relaxation measurements were performed on-2-i, 0.,!
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each bolt tensioned.
The inspector was informed that all relaxation measurements were within the tolerance specified by the architect / engineer. The inspector was unable to verify that relaxation measurements were within limits.
Tolerances were verbally transmitted to the civil contractor prior to tensioning.
Licensee promises that necessary data will be furnished the inspector so that review of tensioning documentation can be completed on a future site visit.
This item is unresolved (373/79-18-01, 374/79-12-01).
b.
When core drilling for the installation of the hold down studs for quencher base plate No. 9 one size No. 14 rein-forcing bar in the concrete was drilled through in order to install the bolts on one side of the plate.
Field change request No. 555 was issued at the site.
Review and approval to cut the bar was received from Sergeant & Lundy (S&L) prior to cutting.
S&L's analysis indicates that cutting the one bar would not affect the integrity of the containment structure.
c.
One stud bolt in Plate No. 18 was bent subsequent to installation.
FCR 608 permitting straightening the bolt without the use of heat was submitted on April 25, 1979.
S&L gave verbal approval to straighten the bolt but docu-mentary evidence of review and approval of FCR 608 was not at the site.
Licensee representatives at the exit meeting agreed to obtain the documentation for the inspector's review.
This matter is unresolved.
(373/79-18-02)
d.
The inspector reviewed material certifications and/or material test reports for embed plates, embed bolts, NDE materials (liquid penetrant), and for hold down nuts that had been received onsite.
e.
Nondestructive testing of welds was being performed in accordance with approved liquid penetrant test procedures.
Qualification records were available for review for each of the three NDE personnel performing liquid penetrant examinations of welding on the modification.
No items of noncompliance or deviations were identified in this area.
3.
Reactor Recirculation System Thermal Sleeve and Safe End Modification The inspector reviewed the following quality assurance documentation for the reactor recirculation system modification for Unit 1:
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a.
CECO quality assurance surveillance reports on radiographic examinations p"erformed on the number 3 welds for nozzles located at 330 270 150", 90, 30 and 210 on the
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reactor vessel, b.
General Electric's traveler showing inspection and hold points and the weld process sheets on welds number 1, 2, and 3 on the nozzle located at 30 on the reactor vessel.
Liquid penetrant reports for nozzles at 30 welds number c.
1, 2, and 3; 90 welds numbe-1, 2, and 3; 120 weld number 1, and 150 welds number 1, 2, and 3.
No items of noncompliance or deviations were identified in this area.
Unresolved Matters Unresolved matters are matters about which more information is required to ascertain whether they are acceptable items, items of noncompliance or deviations.
Unresolved items disclosed during this inspection are discussed in paragraphs 2a and 2b.
Exit Interview The inspector met with representatives (denoted under persons contacted) on May 16 1979.
The inspector summarized the scope and findings of the inspection.
The licensee acknowledged the findings as reported.
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