ML18043B022
| ML18043B022 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 08/21/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Bixel D DUKE POWER CO. |
| References | |
| NUDOCS 7909180005 | |
| Download: ML18043B022 (3) | |
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NRC POR Local POR
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OEi se~_hut Docket No.* 50-~5:5. **
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~.\\WGammi 11 Mr. Davfd Bixet
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Consumers-Power Company TCarter ~. f/IU/. f ;r, 212 West Michigan Avenue OELD.
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Jacksory, Michigan. 49201 OI&~(3)
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- ~ By *1ett~r d~ted July.2.~ _19791, you submitted a,proposed change to ~
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- Tech_JJ1cal, Spe~ific_ations. of,galisades regarding pressure-temperature 'ffl/!Jy
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- operating limits.
The* propo:~ed _operating limits are for operation* *
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to 7~0 x 106 MWdt.
Radiatidn damage is based on* the test* results
, /1 obt?}ined on capsule A~240. \\These results are discussed in Sattel le
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Columbus Report BCL-585-12 \\'ihich is-attached.to your July2, 1979
'letter.. The, fluence at 7.0 x.106 MWdt is based *on an end-of-life fluence at the vessel wall ID of 3.36 ~ 1019 n/cm2.
At the 1/4 T focation values of RTNDI for weld and plate _metals are calculated to increase by 113 and *100 F respectively. The l.inirradiated va*lues :of
- RTNDT for weld and plate ma_terials are e_stfmated to be -85 and O"F respectively. Thus, the plate*material.is the limiting material. * **
We have reviewed *the* proposed pressure-temper.ature operatfng*limits
. and find them unacceptable. This conclusion is based on the fo1low1n_g
- items:
(1) Your 1-etter dated May 23, l.978;. stated* the maximum fluence at the
- . end-of-life would be 3.8 x lol~ n/cm2.
A.value of 3.36-x 101~
. n/cm2 was used in calculations. * *
(2) The_unirradiated value of RTNDT was estimated to be F for weld metal., This' value is based.on charpy data. According* to NRE Standard Review Plan, Section *s.3.2, if dropweight tests._were.
- not performed RTNDT may be a*ssumed to be the temperature at which_
30 ft-lb was obt?ifh~d, or 0°F, which ever is hig~er. *
- (3) Radiation damage, the increase in RTNDT* should be based on
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. results of tests on material surveillance specimens and the chemical content 'of :the mate.rial.
For we*ld metal the surveill?nce results fall on the upper limit line of Regulatory Guide 1.99.
'Thus, above,a fluence of 2 X1 lol9 n/cm2 the upper limit-line of. o' c;ll..
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!OLC fORM 318 (.9-76) NJlCM 0240 U.9. GOVllANMBNT PRINTING OP",..ICC: 1171 - Z*I.. 7~1
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AUG 21 1979 Mr. David Bixel ~)
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Regulatory Guide 1..99 s.hould* ~ used to predA~;t* ;damage.
Below 2 x *lOl 9 n/cm2 _the damage may be predicted.. from the.o. 25% copper*
- line. *
~se.d on the above three concern~, we find that weld metal ;£.limiting.
At 7 x.106 MWdt we estimate the fluerice *at 1/4* T \\li1ill be 5.1 ~.1019 n/cm2. 'The RTNDT e>f weld metal at this fluence is estimated to be*.
165°F.
- Pressure-temperature operating limits.for Palisades should be
-.based_ on thiS value' of RTNDT*
~We request that *you submit new operating limits.which. address the. above
.concerns within. 45 days of the* date of this letter.*.
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See ne~t page Sincerely,
. Qdgirial Signed by:
. Denni a L. ZiemaRn Dennis L Ziemann, Chief Operating Reactors Branch #2 Div_ision of~ Operating *Reactors*
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Mlle POllM 318 (9-76) NRCM 02.cG
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Mr. David Bixel
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cc M. I. Miller, Esquire Isham, Lincoln & Beale Suite 4200 One First National Plaza Chicago, Illinois 60670 Mr. Paul A. Perry, Secretary Consumers Power Company 212 We~t Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consumers Power Company 212 West Michigan Avenue Jackson, Mich1gan 49201 Myron M. Cherry, Esquire Suite 4501 One IBM Plaza Chi.cage, Illino.is 60611.
Ms. Mary P. Sinclair Great Lakes Energy Alliance 5711 Summerset Drive
.Midland, Michigan 48640 Kalamazoo Public Library 315 South Rose Street Kalamazoo, Michig~n 49006 AUG 2 1 1979
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