ML20126B316
Text
y ggggy g g gg 3p
" " ~ ;",{ ;r.
{
(.,
1(,
e.
\\
m n:.
l101-22-010 Ql N8dC[33f Shnrt Fcrm Spacificatian j
g
^
~
( )c. Tsue OTSG KINETIC EXPANSION Page I of 3 DEPTH CRITERIA p'O's ---...-..-----...
-/
Task No.
Preparcd by Date Approved by Dr.:e l
i Prriect Title TMI-l OTSG REPAIR
.g g, g,cg,7f,4
,ar N/A
'c}Un* '"~ii],yf(~,". 'G'P'O5W/E,"~~ i 5~$
~~
1.0 This Specification establishes the criteria by which the depth to which OTSG tubes shall be expanded is to be determined.
2.0 Eddy Current Testing (ECT) indications of defects shall be classified into the following zones:
(a) Zone 1 -- Upper tubesheet primary face to 14 inches above f.he upper tube-sheet secondary f ace (UP to US +14).
(b) Zone 2 -- Between 14 inches and 3 inches above the upper tubesheet secondary face (US +14 to US +3).
-( c) Zone 3 - Between 3 inches above and directly on the upper tubesheet secondary face (US +3 to US +0).
(d) Zone 4 - All tube lenbch below the upper tubesheet recondary face.
I k
.0 All tubes of both OTSGs not already plugged shall be kir.etically expanded to 3
one of two possible' depths:
17" or 22".
3.1 Tubes with no defect indi, cations or defect indications in only one zone shall be expanded as follows:
(a) Tubes with no defect indications, a defect indication or group of defect indications in Zone i shall be expt.nded to a depth of 17".
(b) Tubes with a defect indication or group of defect indications in zone 2 shall be expanded to a depth of 22".
(c) Tubes with a defect indication or group of defect indications in zone 3 shall be expanded to a depth of 17".
(d) Tubes with a defect indication or group of defect indicatiotts in zone 4 shall be expanded to a depth of 17".
Tubes with defect indications in more t'aan one zone shall be expanded in 3.2 accordance with the rules of 3.1 above for the zone containing the lowest elevation def ect within the upper tubrasheet (zones 1, 2 or 3. in order of decreasing elevation).
3.3 Tubes with a defect indication exact.ly at the junction of two zones shall be considered to have that defect indication lower elevation zone of the g
two zones.
s-ta 8506140068 850125 PDR FOIA DET E.N84-897 PDR
~.
Peg 2 2 of 3 m.
r k
~
f~N) 4.0 The considerations taken into account in determining these reiteria are:
v (a) For tubes that shall remain in service, a minimum of 6" of defect-free expanded length is necessary to assure a qualified joint.
(b) For tubes to be removed from service, the. inclusion of defects in the expanded length does not negate the benefits of the expanding the I
tubes.
(c) The best accuracy of defect position by ECT is 3 " of axial length.
1 (d) The total number of 22". deep expansions is to be minimized.
(e) Whenever possible, the transition zone between the expanded and un-expanded areas of the tube should not be allowed to fall on or near a de fe ct.
If this is not achievable, the confluence of transition zone and defect is acceptable only in the case of tubes expanded to 17" depth and removed from service.
5.0 See Figure 1 for the correlation of expansion length, actual defect posi-tion, and defect indication.
The intent of this figure is to illustrate how the physical characteristics of the expansion charge and the al inch uncertainty of actual defect position as determined by ECT defect indica-tion have been taken into account in the definition of zones. Actual
(~}
determination of expansion depth shall be accomplished by applying the
(
\\_/
rules in Section 2.0 and 3.0 of this Specification.
i l
l l
l l
l
/
x_/
- ....e,
P n
Ic d-JNuclear SPECIFICATION NO.
S,_n 01:.22-oio
,o TITLE j
OTSG KINETIC EXPANSION DEPTH CRITERIA REV
SUMMARY
OF CHANGE APPROVAL DATE SECTION
_ CHANGE 1
3.3 Added to remove position ambiguity of g
pj,g, u borderline defect indications.
FIGURE 1 Added Page number and revision number.
3.1(a)
Correct " depth" to " defect".
3.2 Clarify " lowest" to refer to elevation of defect.
3.3 Added to remove position ambiguity of border-line defect indications.
5.0 Expanded to explain scope and limit use of Figure #1 e
e e
t A0000036 6 81
)
- ~ -
g[l fC 7'"'
A"* VAL c.
D6Ytec /Wp(carton NYfcr Msiricw
-up h
)q 74Sf24 n
17 22 TONS 1 0St /7 " fxPAWStoy rer
/>str/oM UNckTAIMry y
713+tf W
ks+/3
- * '* l
^
O
%k Usf 22 "kepAysiny
&y g
EONE 2 O
uS+8 k
g utt 7 s
h r
..j fcr 7kAMstrioy I
f
%y Post 17oW EGNE l
l y
VNe/274tN1Y lsl erh 7I
&573 i
(
L N d
I
\\ f f
I EONE 3 sW N#*E I
I VS2/ "fxFANS/0y l'
O
- l
..t i
i i
3r MS fC l
I l
t A
) ygyg 4,
, U$d /7*/tPMs/0W