ML19308D434

RO 77-77:on 770907,while in Mode 1,chemical Addition Pumps 3A & 3B Found Inoperable.Pumps Believed to Be Airbound.Vent Valves Installed to Preclude Recurrence

ML19308D434
Person / Time
Site:	Crystal River
Issue date:	08/02/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D407	List: ML19308D406 ML19308D434
References
NUDOCS 8002280740
Download: ML19308D434 (2)

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CATECCAY TN ScN COCxET NUMBEA

• EVENT OAfE REPCRT OATE O 1 CCN'T l _ l _ l 7 8 57 58 W59 W60 lo l5 lcl-l0 lq l0 l2 l 61 68 l0 l7 l0 l9 l7 l7l l0 l8 l0 l2 l7 l-69 74 75 i EVENT DESCRIPTICN

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gg [In mode 1 (power operation) on 9 July 1977 and 10 July 1977 preparing to add boric acid 7 89 E

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g l co the makeup tank, both chemical addition pumps' 3A and 'B were found to be inoperable 7 89 . -

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gg l contrary to Technical Specification 3.1.2.2. Redundancy was maintained with the HPI 7 89 E

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Q l pumps and the BWST. Second occurrence of this event, refer LER 77-51 Both pumps were 7 09 . L

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os f restored operable by venting. (LER 77-77) 7 89 ,%,g L E CCOE COMPONENT COCE A R VIOLATON

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o 7 89 10 lRlBl.] lP l Ul Ml Pl Xl Xl lNl 44 l Cl 3 l 0 l 0 l g 11 12 17 43 47 48 ,-

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CAUSE DESCRIPTION / .

Oe l The pumps were believed to have been airoound. Vent valves were installed on each pump '

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7 89 E

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o9 l to preclude recurrence. Event has not recurred since.

7 89 6

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I FACUTY METHoO oF STATUS  % POWER QTHER STATUS CISCOVEAY OtSCOVERY DESCA@TCN 9

y [ 1l 0l 0l l NA l l Al l NA 78 10 12 13 44 45 46 E:

ACTMTV CCATENT .

RELEASEO AMOUNT CF ACTMTV LCCATICN OF RELEASE 12 lZ l OF l ZlRELEASE l NA l l NA 7 8 9 10 11 44 45 , 6.

PERSONNEL EXPOSURES NUMBER TYPE CESCRIPTON

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M l0 l 0l 0l (,Z_j l NA l 7 89 11 12 13 E.

• PERSONNEL INJUAiES NUMBER DESCRPTON l

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l3g l0 l 0l 0l l NA 7 89 11 12 6:

OFFSITE CONSEQUENCES

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7 89 0; LOSS OR DAMAGE TO FACIUTY TYPE DESCA'PTCN

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1 7 89 dl 10 NA LL PUBL!C:TY

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17 l NA 7 89 UC ADDITIONAL FACTCRS gg290 M O v' 8 9 ut l

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i9 l See Attached Supplementary Information l 7 89 , ut.

NAME:

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W. P. Stewart pyong: (813) 866-4159

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SUPPLEMENTARY INFORMATION

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Report No.: 50-302/77-77 2.

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Facility: Crystal River Unit #3

3. Report Date: 2 August 1977

4. Occurrence Date: 9-10 July 1977

5. Identification of Ce.urrence:

Cheuical addition pumps CAP-3A and 3B inoperable contrary to Technical Specifications 3.1.2.2.

6. Conditions Prior to occurrence:

Mode 1 power operation.

7. Description of Occurrence:

At 0810 on 9 July 1977 and 0815,10 July 1977 preparing to add boric acid to the nakeup

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tank, chemical addition pumps 3A or 3B would not deliver boric acid to the tank. The -

pumps were determined to be airbound and were vented on each occurrence, restoring operability.

8. Designation of Apparent Cause:

The system was thoroughly checked and no immediate cause for the pumps being airbound was iound.

9. Analysis of Occurrence:

This event had no safety significance as the high pressure injection pumps and the

, borated water storage tank were available and operable.

10. Corrective Action:

Vent valves were installed on each pump and appear to have been effective in precluding recurrence as the event has not repeated.

11. Failure Data:

These two occasions constituted the second occurrence of this event. Previous occurrence reported as LER 77-53.

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