AECM-80-126, Responds to IE Bulletin 80-09, Hydramotor Actuator Deficiencies. Two NH90 Series Hydramotor Actuators in Use. Evaluation Indicates That No Mods Required
| ML19326E059 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 06/16/1980 |
| From: | Dale L MISSISSIPPI POWER & LIGHT CO. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| Shared Package | |
| ML19326E056 | List:
|
| References | |
| AECM-80-126, IEB-80-09, NUDOCS 8007250520 | |
| Download: ML19326E059 (2) | |
Text
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' Attachment A to AEC:!-30/158 p.:.b;' i h],b,N A S S I S S I P P I ? O W E R & L i d"5"I O v1 P A N Y
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'une 16, 19E2 U.S.
!uclear Regulatory Co.Tuission Director of Reactor Construction inspectf.;a, 0.1.L.
'a'a s hin g t o n, D. C.
20555 Gentle:ca:
SU3 JECT Grand Gulf '.a:lcar S ction Units 1 cad 2 a.
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. 160 b.30v/h.... f...-C.'
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IL uullet;n S0- 2 Zvalu L ca 4.
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1:e have deternined that two :m90 series Hydra:.otar Actuatore manuf actured by ITT General Controls are beir utilined
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'.'..e Grand Gulf ::uclear Plants, Units 1 and 2.
..csc actuat.t:, indcatificj
.C, with tag numbers IT.'.S-PDZ-F500 A aad i; and 2TI.S-PDZ-r500 A and... serva
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posi;ica the inlet vancs for the Standby Cas Treatment Sy s te::. Caarcoal
- 'l1 Filter Trains.
Informatien fron the Filter Train :Unufac.:.rar indica.es taa; th i,
actua:Ing torque for the vanes is 3 to 10 fL.-lbs.
f A study of.he lin.cge between the r.ctuator. c. d canes indic:. cs ta:L, ne glectin;; linkt.gc f riction, 19 % o f t he f o r c e t ran r. e. '.e ?. : r e n U.e actuat~or to the linkage will be availabic at :ne vanes..ae Ica,:th of tac linkage is 12 inci.cs.
The linkage friction loss has been arbitrarily assuned to be equal to 100% of the linkar,e forca required at the var.es (10 lbs.).
The force required fron the actuator to po n tica the anes is 10 lbs./.19 plus 10 lbs. which equals 62.63 lbs.
The : orce av iilabic f r.m the actuator is 15CO lbs. ( ated). Actuator deration fer..:ccrcc: sr..',
material is 160 lbs.
Actuator deration for in:arnal h e 'r nu.ic.md fricti n losses equals 140 lbs.
Calculation for the c.lja;ted act ater cating :s s follows:
Ac:uctor Rating, 1300 lbs.
Less 160
.bs.
Less ll,0 lbs.
Adjus cd Actuator Rating 1200 lbs.
Dividing the adjusted actuator ratin; (1200 lbs.) cy U a force :equ'.rca froa the actuator to actuate the vanes (62.63 lbs.' and nuit plying by 100 will show a nominal ac:uator force reserve of 2002..
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Mu~-SIS 31PPl POWE4 Cc LIGHT COMP ~4Y Attachment A to AECM-80/158 Page 2 of 2 j
U.S. Nuclear Regulatory Comnission
/.cN-SO/1/6 Director of Reactor Construction Inspection, 0.1.E.
Page 2 The above ovaluation reveals the conservative applicati:n of the subject actuators.
No threat to the health or welfare of the public u f eund.
Therefore, no modifications to the existin,; equipmeat, its qual;.;ation or preoperaticnal and startup tasting are nc essary.
'1c have not ccepleted our investigatica to de:. ermine if e act applications are nade of the '. :00 Ilydranator ac.uator by ITT Concral Centrols.
Therefore, va request an extension until September '., 1930.
Should you have any questions regarding this matter, pleas advise.
'f o u rs t r;2ly,
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- 1. F. Dale Sucicar Proj ect ::anager MRK/JDR:l=
cc:
Mr. N. L. Stamptcy bec:
Dr. a.
C.
Gibbs Mr. R. B. McCchee Mr. Adrian ZJecarid Mr. T. 3. Conner
'tr. J. :,. *la rd
- !r. D. 't 1.a ke Mr. Victor Stello, Jr., Director "c.
H.
C icn i n;;e r Division of Inspection L "nforcement
'!r. J.
P. S'cCaughy U.S. Nuclear Rcgulatory Commissica Mr. ~.
E.
"e a ve 82/
liashington, D.C.
20555 Mr. C. K.
'.:cCoy
!r.,..,
te verton Mr. J. P. O'Reilly, Director Mr. A.
R.
Snith Office of Inspectica & Enferccment Mr. Tom Houghton U.S. Nuclear Regulatory Commission Mr. M.
D.
Hunt Region II File 101 Marietta St., ':
'!.. Suite 31LJ Atlanta, Ccorgia 30303 i
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