ML17266A057

LER 78-043/03L-1 on 781120:during Power Operation Cambridge Electron Accelerator 62 Slipped 13 Inches a Second Time to Point 43 Inches Below Original Position.Personnel Misinterpreted Tech Specs

ML17266A057
Person / Time
Site:	Saint Lucie
Issue date:	04/02/1979
From:	Schoppman M FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17206A727	List: ML17206A726 ML17266A057
References
LER-78-043-03L, LER-78-43-3L, NUDOCS 7904130237
Download: ML17266A057 (5)

Text

UPD+ REPORT PREVIOUS REPORT DRTEI12/19/78 Caitiff NRC FOR!9f &8 V *NVCLSAR RSCVLAJ'ORY f~r P JJ3 LlCFNSE" scil I REQQRT i

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"" 59 ZVZIITQATC + 15 ACPQIITQ* 1 30 99 SUFi4TOSSCRIPTION ANO PROSASI = CONSCCJ iVCSS GQ During power operation, CEA 862 slipped 13 inches requiring ACTION per LSpecification 3.1.3.1d. llhile moving this CEA back to its original posi-tion, it slipped again to a point Ie3 inches below its original position.

0 9 CEA II62 was quickly returned to its normal position, but reactor power was not reduced when the second slip occurred as xequired by Specification

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3. 1 . 3 . 1 e (for CEA,' out of a 1 ignment by 1 5 inches or more) . This is the first occurrence of this type.

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'EA 862 slipped for no apparent It was 9

0 reason. not in motion when the first slip occuxred. Power was not reduced due to misinterpretation oK the intent of T.S. 3-1.3.le by operating shift personnel. All operations personnel have reviewed this T.S. and are fully aware of its intent and applicability. This YER will be emphasized in future training classes.

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REPORTABLE OCCURRENCE 335-78-43 UPDATE REPORT LICENSEE EVENT REPORT PREVIOUS REPORT 12/19/78 PAGE TWO ADDITIONAL CAUSE DESCRIPTION AND CORRECTIVE ACTIONS:

CEA 8'62 slipped from 135" to '122." It was not in motion at'he time of this slip. ACTION per T.S. 3.1.3.ld (CEA misaligned >7.5 but <15") was:

initiated. "

While CEA 862 was being withdrawn to its original position (135"), it slipped to. 92" (from 127").

At .this point, operating shift personnel failed to- initiate the ACTION stated in T.S. 3.1.3.le (CEA misaligned >15"). Reactor power was not reduced as required by this T.S. Instead, ACTION as stated in T.S.

3.1.3.ld was. continued and CEA 862'was withdrawn to its original posi-tion (135").

All operations personnel have reviewed the T.S. in question and are fully aware of its intent and applicability. This LER will'e empha-sized in future training sessions. Also, a precaution has been added to OFF-Normal Operating Procedure No. 0110030 (FLCEA OFF-Normal Oper-ation and Realignment) advising the operator to proceed to the appli-cable instruction if the CEA that initially was misaligned by less than 15" becomes misaligned by more than 15", or drops, while aligning the CEA to within 7.5" of its CEA Group.

I P.O. BOX 529100, MIAMI,FL 33152 FLORIDA POWER 4 LIGHT COIvIPANY April 4, 1979 P RN-L I-79-104 Mr. James P. O'Reilly, Director, Region II Office of Inspection and Enforcement U. S. Nuclear Regulatory Comnission 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303

Dear Mr. O'Reilly:

REPORTABLE OCCURRENCE 335-79-9 ST. LUCIE UNIT 1, DATE OF OCCURRENCE.: MARCH 5, 1979 It TECHNICAL SPECIFICATION 3.1 .3.1 CEA f/2 The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to provide 30-day notification of the subject occurrence.

Very truly yours, A. D. Schmidt Vice President Power Resources MAS/cph Attachment cc: Director, Office of Inspection and Enforcement (30)

Director, Office of Management Information and Program Control (3)

Harold F. Reis, Esquire File 933.1SL PEOPLE... SER'4INQ PEOPLE

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Ub'le erformin the CEA Periodic Exercise Surveillance Test, CEA 2 was inserted to a 7. 5 inches misalignment to check CEA position deviation alarms. It would not withdraw due to the presence of a "full out" posi-

~os tion indication. It was inserted 2.5 or more inches in attempting to Q7Q clear the signal resulting in a 10 inches deviation. ACTION per T.S.

~or 3.1.3.ld was taken and the CEA restored to operable in 53 minutes. This is the second occurrence of this type (see. LEE 335-77-17). l 3 9

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~io The CEA misalignment was caused by a faulty upper electric limit reed switch. The CEA has a redundant reed switch that performs the same I function as the faulty swi'tch. The faulty switch was de-energized; thus enabling the redundant switch to control outward CEA movement. The 1

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