ML19031B171

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LER 1977-092-03 for Salem Unit 1 Boric Acid Storage Tanks
ML19031B171
Person / Time
Site: Salem  PSEG icon.png
Issue date: 01/25/1978
From: Librizzi F
Public Service Electric & Gas Co
To: Grier B
NRC/IE, NRC Region 1
References
LER 1977-092-03
Download: ML19031B171 (4)
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Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201/622-7000 January 25, 1978 Mr. Boyce.H. Grier Director of USNRC Off ice of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 77-92/03L Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurren~e 77-92/03L. This report is required within thirty {30) days of the occurrence.

Sincerely yours,

.*)?//~rt._._.

. \'/1-F. P. Libri~zi General Manager -

Electric Production CC: Director, Office of Inspection and Enforcement {30 copies)

Director, Office of Management Information and Program Control

  • (3copies)

Report Number: e 77-92/03L Report Date: l/ll/78 Occurrence bate: 12/30/77 & 1/4/78 Facility: Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Boric Acid Storage Tank Volume Less than allowed by Technical Specifications.

CONDITIONS PRIOR TO OCCURRENCE:

12/30/77 - Operational Mode 1, Reactor Power: 30%

1/04/78 - Operational Mode 1, Reactor Power: 54%

DESCRIPTION OF OCCURRENCE:

At 2151 hours0.0249 days <br />0.598 hours <br />0.00356 weeks <br />8.184555e-4 months <br />, on 12/29/77, the reactor was taken critical following a forced outage. At 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br />, on 12/30/77, the Control Operator observed that the boric acid storage tanks were below the required 5106 gallon level. Technical Specification Action Statement 3.1.2.8.a was implemented. Shift personnel had anticipated the need for additional boric acid and had begun batching on the previous 4xl2 shift .. Boron addition to the Reactor Coolant System as a result of Xenon decay and burnout was greater than the batching could supply.

At 1255 hours0.0145 days <br />0.349 hours <br />0.00208 weeks <br />4.775275e-4 months <br />, after multiple boric acid batches had been trans-ferred to the storage tanks the level was sufficient to terminate Action Statement 3.1.2.8.a. Boron addition to the RCS continued

  • and at 1525 hours0.0177 days <br />0.424 hours <br />0.00252 weeks <br />5.802625e-4 months <br />, Action Statement 3.1.2.8.a was again implemented with storage tank level less than 5106 gallons. Batching continued until at 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br /> the level was greater than 5106 gallons and Action Statement 3.1.2.8.a was terminated.

On 1/4/78 at 1921 hours0.0222 days <br />0.534 hours <br />0.00318 weeks <br />7.309405e-4 months <br />, the boric acid storage tanks were again less than 5106 gallons. The unit wa~ recovering from a reactor trip that had occurred at 0225 hours0.0026 days <br />0.0625 hours <br />3.720238e-4 weeks <br />8.56125e-5 months <br />. With the unit at 54%

power, Xenon burnout and decay required boration which reduced the.storage tank levels to less than required by Technical Speci-fication 3.1.2.8. Action Statement 3.1.2.8.a was implemented and batching continued until at 0225 hours0.0026 days <br />0.0625 hours <br />3.720238e-4 weeks <br />8.56125e-5 months <br /> on 1/5/78, the tank levels were above 5106 gallons and the Action Statement was terminated.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

These occurrences were a result of reactor startups. Xenon decay and Xenon burnup necessitated boration rather than the normal dilution. The resulting boration caused the volume to decrease to

LER 77-92/03L 1/11/78

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less than the 5106 gallons allowed by Technical Specification 3.1.2.8.

These occurrences were caused by a procedural inadequacy in that the log used to maintain *tank levels only required 70% or 5106 gallons to be maintained. Although the storage tank levels were normally maintained above this level, little margin existed for operational considerations.

ANALYSIS OF OCCURRENCE:

Technical Specification Action Statement "a" for :t.co 3.1.2.8 states that with the boric acid storage system inoperable, restore the storage system to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at* least Hot Standby within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> anc;1 borated to a shutdow:n margin equivalent to 1% ~K/K at 200°F; restore the boric acid storage system to operable status within the next_7 days or be in Cold Shutdown

  • within the next 3 0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />. The boric acid storage tanks volume was increased to greater than 5106 gallons within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, therefore, no mode reduction was required.
  • CORRECTIVE ACTION:

Batching of boric acid and transfers to the storage tanks brought the levels back to within the Technical Specification limits.

To prevent reoccurrence of this type of event, an administrative limit of 92% has been established. This limit will allow for oper-ational considerations while maintaining the storage tanks well within the Technical Specification limits.

- FAILURE DATA:

N/A Prepared by T. L. Spencer

~~~~~--"'---~~~~~~~

Manager - sliem Generating Static SORC Meeting No.~~-4_-_7~8~~~~~~

LER NO.:~------:--=-::.:......:..::..:::...

77-92/03L

... --,. *..---:--~: ' * - REPORT DATE: 1/11/78

- .I_ -* .* ' ,

Ll~ENSEE EVENT R~POR-T . --~_;__-

CONTROL BLOCK 6

L.ICENSEE L.ICENSE EVENT NAME 1..JC£NSE NUMBER TVPE TVPf!;

REPORT REPORT CATEGORV TV~ SOURCE OOCKET NUMBER EVENT CATE REPORT CATE

- ~ CONl1s-rl-J I~I l..k1 I 0 I 51 0 I -I 0 I 2 I 71 21 61 68 1112131017171 69 74 I OI 11 11 11 7 !

75 2J EVENT DESCRIPTION

@]!!!At 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br />, during load increase, control operator observed that the I 7 8 9 60

.[ill] I bbric acid storage tanks were less than the 5106. gal. required by. Tech 7 89 .

sJ

@El I Spec 3.1.2.8.

7' 8 9 -*

Action Statement 3.1.2.8 implemented. Levels were re- J

@ml established. 92% administrative limit established to allow for oper- I 7 8 9 90

~I ational considerations. This is the 2nd occurrene of this type.(77-92/01L) 7 8 9 SYSTEM CAUSE -

PRIME COMPONENT COMPONENT eo CCOE cooe: COMPONENT cooe: SUPPl..IER MANUFACTURER VIOL.ATION 1

[ill] IS IF I a9 10 LQJ 11 IZIZIZIZIZIZI 12 17 w43 IZI 919191 44 . 47 lNJ 4ll CAUSE OESCAIPTION rrn19

~1 Procedural inadequacy required only 70% level to be maintained.

level did not allow for operational considerations.

-1 a 9 7[Ifil~-----------------------------------~------------------------------.,..,!

8 9 FACILITY METHOOOF r.r.1 STATUS _ '4POWER QTHE-fl STATUS CISCCVERV . CISCOVEAV OESCRIPTIOft l.!..L.!J l.f.J. 1013101 I NtA I~

7 ll- 9 10 12 13' 44 45 FORMOI' ACTIVITY CONTENT REl..£ASEO OF REL.E;ASE AMOUNT OF ACTIVITY LOCATION 01" REU::ASE

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. N/A 7 8 9 10 11 P!RSONNELEXPOSUA!S NUM"A TYPE DESCRIPTION E@]IOIOIOI 7 8 9 11 tZJ 12

~'--------*=N~/A=----------------------------.._;,,-----.__- - i 13 PERSONNEL INJURIES r:r.1 NUM9ER

  • CESCRIPTION
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OFFSITS CONSSQUENas GTsl I . . N/A

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LOSS CA OAMAGS TO FACILITY.

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OEa~a:-----------------~-------~~------------~so NAMe: ________..;;;T;..;..."-"'L:..*=-*-"'S"'"o:..e=-n=c:..:e...r=----- PHONE: (609)365-7000 E..~t. Salem 528

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