IR 05000395/1985044

Insp Rept 50-395/85-44 on 851119-22.No Violations or Deviations Noted.Major Areas Inspected:Licensee Action on Previous Insp Findings,Snubber Surveillance Program & Reactor Bldg Tendon Surveillance Program

ML20138Q663
Person / Time
Site:	Summer
Issue date:	12/10/1985
From:	Jape F, Lenahan J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:
Shared Package
ML20138Q659	List: IR 05000395/1985044 ML20138Q656
References
50-395-85-44, NUDOCS 8512270356
Download: ML20138Q663 (5)

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Report No.: 50-395/85-44 Licensee: South Carolina Electric and Gas Company Columbia, SC 29218 Docket No.: 50-395 License No.: NPF-12

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Facility Name: Sumer ,

Inspection Conducted: November 19-22, 1985 Inspector: 8-J. J. LehahaA

.b /2-/ .- T(S Date Signed Approved by: b /A-/o - fS Date Signed p F. Jape, Section Chief Engineering Branch Division of Reactor Safety SUMMARY

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Scope: This routine, unannounced inspection entailed 27 inspector-hours at the

site during normal duty hours, in the areas of licensee action on previous inspection findings, the snubber surveillance program, and the reactor building tendon surveillance progra .

Results: No violations or deviations were identifie l M

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REPORT DETAILS

' Persons Contacted Licensee Employees

• 0. S. Bradham, Director, Nuclear Plant Operations

• J. Connelly. Deputy Director, Nuclear Plant Operations

• H. I. Donnelly, Senior Nuclear Licensing Engineer

• D. Moore, Group Manager, Quality Services

• M. D. Quinton, Manager, Maintenance Service

• J. K. Todd, Structural Engineer J. Turkett, Maintenance Engineer

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Other licensee employees contacted included three engineers, and two technician NRC Resident Inspectors

• P. C. Hopkins

• R. Prevatte

• Attended exit interview Exit Interview The inspection scope and findings were summarized on November 22, 1985, with those persons indicated in paragraph I above. The inspector described the areas inspected and discussed in detail the inspection finding No dissenting coments were received from the license The licensee did not identify as proprietary any of the materials provided to or reviewed by the inspector'during this inspectio . Licensee Action on Previous Enforcement Matters (Closed) Unrescived Item (395/84-14-01) Functional Testing of Mechanical Snubbers. The inspector reviewed an South Carolina Electric and Gas (SCE&G).

memorandum dated February 13, 1985, Subject: Snubber Functional. Testing Revie This memo documents discussions with.the snubber manufacturer's representativel concerning the adequacy of the licensee's test methods to verify mechanical snubber activation. The snubber manufacturer stated that the licensee's test method is acceptable for verifying activatio The

, licensee's Technical Specification (TS) does not require measurement of a specific value for activatio The TS only requires verification that activation takes plac The inspector reviewed procedure number STP-403.003, Mechanical Snubber Basic Operator Test and verified that the procedure meets the TS requirement. This item is close _ .- . . - . - . -

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2 Unresolved Items Unresolved Items were not identified during the inspection.

, Snubber Surveillance Program (61729)

The inspector reviewed procedure and quality record related to surveillance of hydraulic snubbers. The inspector also inspected selected snubbers on the main steam line. Acceptance criteria utilized by the inspector appears in Technical Specification 3/4. Review of Snubber Surveillance Procedures The inspector examined procedure number STP-403.004, Hydraulic Snubbers, which controls surveillance of hydraulic snubber Review of Quality Records The inspector reviewed quality records documenting inspection of hydraulic snubbers. Records reviewed were as follows:

(1) Result of visual inspection of the 15 hydraulic snubbers installed on the three steam generators (five installed on each steam generator)

(2) Results of functional testing performed on two hydraulic steam generator snubbers, serial numbers 1603 and 160 Inspection of Snubbers

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The inspector examined mechanical snubbers installed on portions of the-main steam lines, inboard of the main steam isolation valves, in the intermediate building. The inspector verified that the snubbers were

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not damaged and that attachments to the supporting structure and piping were secur . Containment Building Tendon Surveillance (61701)

The inspector examined procedures, work activities, and quality records relating to the contziament building tendon surveillance program. Accept-ance criteria utilizid by the inspector appear in Technical Specification 3/4.6.1.6. Details of the inspection are as follows: Review of Tendon Surveillance Procedure l,

The inspector examined procedure number STP-160.001, Containment Tendon s Tes This procedure specifies the requirement for inspection, testing, analysis, and data reporting for the containment building post-tensioning system.

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3 Observation of Tendon Surveillance Work Activities The inspector _ witnessed stressing operation for determination of the lift off forces in horizontal tendon numbers 17BA and 8CB. Since the lift off forces were below 95% of the base value in both of these tendons, it was necessary to restress the tendons to restore the prestress to the base value stated in the Technical Specification The inspector witnessed restressing of tendon 17B The inspector examined the anchorage assemblies on tendon numbers 17BA and 8CB and verified that the inspection of the anchorage assemblies was conducted and documented in accordance with procedure STP-160.001. The inspector witnessed sampling of the tendon void filler material (grease) from the ends of tendon numbers 17BA and 8CB. The grease sample will be tested for compliance with TS Section 4.6.1.6.c by an independent offsite laboratory, Review of Quality Records Relating to Tendon Surveillance Activities The inspector examined the following records relating to tendon surveillance activities:

(1) Records for prestress force confirmation tests (lift off) for horizontal tendon number 17BA, 18BA, 19BA, 32BA, 33BA, 34BA, 37CB, 38CB, and 39CB (2) Records for anchorage assembly surveillance inspections for horizontal tendons listed in (1) above (3) Records for anchorage assembly surfeillance inspectors for field ends of vertical tendon number V-23, V-37, V-60, and V-10 (4) Records for tendon anchorage concrete crack inspection for tendon numbers 17BA, 18BA, 19BA, 37CB, 38CB and 39CB Review of the records for lift off forces present in the horizontal tendons and discussions with licensee engineers disclosed that the normalized lift off force was less than the minimum average value of 1181 Kips specified in T.S. 4.6.1.6.1.b for the horizontal tendon When the licensee became aware of the problem after the lift off forces had been measured in seven tendons (average normalized lift off of 1168 Kips) Action Statement a. of .T.S. Section 3.6.1.6 was invoked. The action statement requires an ' engineering evaluation be performed to demonstrate structural acceptance of the containment structure.- The inspector examined the engineering evaluation which was documented in a memorandum dated November 20, 198 Based on an analysis performed

. by the licensee's Architect-Engineer, Gilbert Associates, Inc., the licensee concluded that a minimum value of 1078 Kips is the required lift off force to maintain containment structural integrit Therefore, the lift off values measured during the current surveillance

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j are-acceptable. The licensee plans to submit an amendment to the

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Technical Specification to correct .the minimum average lif t off valves i stated in the T. S. Within the area inspected, no violation or deviations were identifie .

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