ML20236F587
| ML20236F587 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 06/19/1986 |
| From: | Rivenbark G Office of Nuclear Reactor Regulation |
| To: | Beckham J GEORGIA POWER CO. |
| References | |
| TAC-61283, TAC-61284, NUDOCS 8711020225 | |
| Download: ML20236F587 (3) | |
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-Docket No.-50-321/.366-a 4,,
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.Mr.1 T. Beckham,' Jr.
Vice President, Nuclear.Ge'neration Georgia, Power Company 3
P.10.. Box 4545 y"
' Atlanta, Georgia ~ 30302'
Dear Mr. Beckbin:
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request tol revise lthe' Hatch Unit li
'.We.are r'eviewing your'Mpril 15,;19863 and 2 Technical, Specifications. RIn order.to complete ourireview:of thel l
changes relating to the Rod Worth. Minimizer.and' Rod Sequence' System,Lwe j
need.the additional information' described in the' enclosure..You areL f
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requested to provide.a; written.. response,; submitting theLrequested.iin-formation,.within:30 days of receipt of this letter.
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The reporting and recordkeeping requirements of this..: letter affect fewer?
L than-ten respondents;.therefore, ONBlclearancelis not. required.undEr P.L:.
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96-511.-
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-Sincerely, q
J0riginal signed by :
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Daniel R. Muller L.
' George W..Rivenbark,LProject~ Manager.
J BWR Project' Directorate #2:
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Division of BWR Licensing.
Enclosure:
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Request for Additional l
Information 1
DISTRIBUTION:
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.0FFICIAL RECORD COPY' r
- 871102O225 B60619LL
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1 ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION FOR -
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PROPOSED TECHNICAL SPECIFICATION CHANGES 1
FOR THE RWM AND RSCS FOR" HATCH
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l Georgia Power Company has (in part)' proposed in a. letter dated April 15,.1986, that Technical Specifications (TS) for Hatch Nuclear Plant Units 1 and 2 relating to Rod Worth Minimizer (RWM) and Rod Sequence Control System (RSCS).
j operation be changed to permit " Banked Position Withdrawal Sequence" control rod withdrawal for the first 50 percent of the control rods. The staff review of the proposal has indicated the need for additional info'rmation. The staff?
viewpoint and concern relevant to'the proposal and the needed additional
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information is provided in the following discussion.
1 In the 1972 - 1975 era when the RSCS was provided for some reactors and--
stricter TS on RWM operability and use were introduced for reactors not being equipped with a RSCS, it was in part because of the staff. perception.that the l
previous effectiveness of the RWM was minimal since (a.) little effort was expended in maintaining or improving RWM operability and capability, and the
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second operator substitution was becoming a frequent and routine occurrence and (b.) the second operator was providing relatively little reduction in error probability because of poor procedures and quality control of the monitoring operations.
Since that time the RWM TS operabili.ty requirements for plants using only the RWM appear to have resulted in greatly improving the availability of_the RWM.
With the proposed changes Hatch will be using only the RWM in the first 50 i
percent withdrawal. Therefore, it should be clearly the intent-to maintain l
maximum operability of the RWM and minimum reliance on the;second operator.
However, increased attention should also be payed to the problems associated i
with the effectiveness of the additional operator (when needed) in the process of error reduction.
Failures of the second operator to halt error processes i
which have occurred over the' years (e.g., most recently March'18, 1986, the incident at Peach Bottom 3) have continued to demonstrate a need to further assure the second operator effectiveness.
It is requested, therefore, that Hatch (a.) indicate specific intent..to maintain maximum operability of the RWM, (b.) review, and where needed improve, procedures and related forms, physical setup and quality control to assure that the second operator provides an effective and truly independent monitoring of the control rod movements, ar.d provide the staff with a -
description of this review and resulting procedure.
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<hf-Mr. J. T. Beckham, Jr.
Edwin. I.. Hatch Nuclear Plant, Georgia Power Company Units Nos. I and 2 o
Cc:
Bruce W. Churchill Esquire Shaw,Pittman,PotIs&Trowbridge 1
1800 M Street, N.W.
,o Washingtonj D.C.
20036 Mr. L. T. Gucwa Engineering Department
-Georgia Power Company P. O. Box 4545
. Atlanta, Georgia 30302
/
Mr. H. C. Nixidr., General Manager Edwin 1. Hatch Nuclear Plant-
/4 Georgia Power Company P. O. Box 442 Baxley, Georgia 31513 Mr. Louis B. Long Southern Company Services, Inc.
.,y P. O. Box 2625
.a Birmingham, Alabama 3E202 j
g Reifdentinspector
,V U.S. Nuclear Regulatory Comission Route 1, P. O. Box 279 Baxleyn Georgia 31513 RegionabAdministrator, Region 11 U.S. Nuclear Regulatory Comission, 101 Marietta Street, Suite 3100 Atlanta, Georiga 30303 Mr. Charles H. Badger Office of Planning ar.6 B6dpet Room 610 270 Washington Street, S.W.
Atlanta, Georgia 30334 Mr. J. Leonard Ledbetter, Commissioner Department of Natural Resources
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270 Washington Street, N.M;-
Atlanta, Georgia 30334 y
c Chainnan l
Appling County Commissioners County Courthouse l
l Baxley. Georgia 31513,
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