ML20028F223

Proposed Changes to Tech Specs,Reducing Number of Tendons Inspected Beginning W/Second 5-yr Insp

ML20028F223
Person / Time
Site:	Arkansas Nuclear
Issue date:	01/26/1983
From:	ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML20028F219	List: ML20028F218 ML20028F223
References
NUDOCS 8301310279
Download: ML20028F223 (1)

Text

.

4.4.2 Structural Integrity Applicability Applies to the structural integrity of the reactor building.

Objective To define the structural integrity of the reactor building.

Specification 4.4.2.1 Tendon Surveillance For the tendon surveillance program, to be conducted over the life of the unit, twenty-one tendons shall be selected on a random but represent;i,M basis each surveillance for inspection for symptoms of material deterioration or force reduction. The surveillance tendons shall consist of ten hoop tendons, at least three in each of the three 240 sectors of the reactor building; five vertical tendons located at approximately equally spaced intervals; and six dome tendons, two in each of the three groups of dome tendons.

If the results of the tendon surveillances conducted at the 1, 3 and 5 year intervals are acceptable, then nine (9) surveillance tendons shall be selected on a random but representative basis.

The nine surveillance tendons shall consist of three hoop tendons, at least one in each of the three 240 angular sectors of the reactor building; three vertical tendons located at approximately equally spaced intervals; and three dome tendons, one in each of the three groups of dome tendons.

4. 4. 2.1.1 Li f t-Of f Lift-off readings shall be taken for all surveillance tendons.

4.4.2.1.2 Wire Inspection and Testing A minimum of three surveillance tendons, one from each of the hoop, vertical and dome families, shall be relaxed and one wire from each relaxed tendon shall be removed as a sample and visually inspected for corrosion or pitting. In addition, the applicable anchor assemblies shall be inspected for deleterious conditions, such as corrosion, cracks, missing wires and off size button heads. Tensile and elongation tests shall also be performed on a minimum of three specimens taken from the ends and middle of each of the wires. The specimens shall be the maximum length acceptable for the test apparatus to be used and shall include areas representative of significant corrosion or pitting.

After the wire removal, the tendons shall be retensioned to the stress level measured at the lift-off reading (and changes in shim thicknesses shall be recorded) and then checked by a final lift-off reading. The tendon elongation during retensioning shall be measured.

85 8301310279 830126 DR ADOCK 05000

..