ML20078N184

Proposed Tech Specs Amend Suppl Modify SR 4.4.5.2e Re Rotating Pancake Coil & 4.4.5.4a.13 Reference to non-current Methodology

ML20078N184
Person / Time
Site:	Catawba
Issue date:	01/27/1995
From:	DUKE POWER CO.
To:
Shared Package
ML20078N165	List: ML20078N163 ML20078N184
References
NUDOCS 9502150166
Download: ML20078N184 (2)

Text

\

REACTOR COOLANT SYSTEM

' SURVEILLANCE REQUIREMENTS (Continued)

' 1) All nonplugged tubes that previ'ously had detectable wall penetrations (greater than 20%),

2) Tubes in those areas where experience has indicated potential problems, and

3) A tube inspection (pursuant to Specification 4.4.5;4a.8) shall be performed on each selected tube. If any selected tube does not permit the passage of the eddy current probe for a tube inspection, this sha'l be recorded and an adjacent tube shall be selected and subjected to a tube inspection.

c. For Unit 1, in addition to the 3% sample, all tubes for which the alternate plugging criteria has been previously applied shall be inspected in the tubesheet region.

d. The tubes selected as the second and third samples i('f required by Table 4.4-2) during each inservice inspection may be subjected to a partial tube inspection provided: i

1) The tubes selected for these samples include the tubes from those areas of the tube sheet array where tubes with imperfections were previously found, and

2) The inspections include those portions of the tubes where imperfections were previously found.

e. For Unit 1, implementation of the interin steam generator tube / tube support plate elevation plugging limit fr 0715 requires a 100%

bobbin probe inspection for all hot leg tube support plate intersections and all cold leg intersections down to the lowest cold 58" MW# les tube support plate with outer diameter stress corrosion cracking pAoM ATTMasb -(00 500) indications? An inspection using the rotating pancake coil yAGE (RPC) probe is required in order to show operability of tubes with flaw like bobbin coil sinami - litudes orantar

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than 1.6 vo't but i.i.1 u r aL w7 ,val E " - '-" ;) l l a< m < t hma r r, r r, .....tn

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n resuiu are to ersivates to establish'Inat tne princ' pal indications can be e characterized as 00 SCC.

The results of, each sample inspection shall be classified into one of the following three categories:

Q1ggn Insnection Results C-1 1.ess than 5% of the total tubes inspected are degraded tubes and none of the inspected tubes are defective. 4 l

l CATAWBA - UNITS I & 2 3/4 4-13 Amendment No. (. Unit 1)

. Amendment No. (Unit 2) i p pg AD CK O O Op P

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REACTOR COOLANT SYSTEM

.. SURVEILLANCE REQUIREMENTS (Continued) 17..h is verifie o result in total primary to secondary leakage less than iHhe-gpm Lincludes operational and accident leak-f* *

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2. A tube can remain in service with a bobbin coil signal amplitude greater than 1.0 volt but less than 2.7 volts provided a rotating pancake coil (RPC).. inspection does not detect degradation.

3. Indications of degradation with a flaw type bobbin coti signal amplitude of equal to or greater than 2.7 volts will be plugged or repaired.

pas 2RT MRhodth98 Certain tubes as identified in WCAP-1349(, Rev.1, will be 4 N "" excluded from appiteation of the Interim Plugging Criteria t.imit 966'E as it has been determined that these tubes may collapse or deform following a postulated LOCA + SSE Event.  ;

b. The' steam generator shall be determined OPERASLE after' completing the

.- corresponding actions (plug or repair all tubes exceeding the repair

• limit.and'al tubes containing through-wall cracks) required by Table 4.4-2. ~ For Unit 1, tubes wit 3 defects below F* fall under the alternate tube plugging criteria and do not have to be plugged.

4.4.5.5 Ranaris *

. a. Within 15 days following the comp'letion of each inservice inspection of steam generator tubes, the number of tubes rept. ired in each steam generator shall'be reported to the Coemission in a Special Report pursuant to Specification 6.9.t;

b. The complete results'of the steam generator tube inservice inspection shall be submitted to the Commission in a Special Report pursuant to

/ Specification '6.9.2 within 12 months following the completion of the inspection. This Special Report shall include:

, 1) Number and extent of tubes inspected, I

l CATAWBA - UNITS 1 & 2 3/4 4-16a Amendment No. (Unit 1)

Amendment No.1 (Unit 2) w-=- --