05000280/LER-2077-002, Reportable Occurrence Relating to Boric Acid Transfer Pump

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Reportable Occurrence Relating to Boric Acid Transfer Pump
ML19105A123
Person / Time
Site: Surry  Dominion icon.png
Issue date: 02/28/1977
From: Stallings C
Virginia Electric & Power Co (VEPCO)
To: Moseley N
NRC/RGN-II
References
Serial No. 076 LER 1977-002-00
Download: ML19105A123 (7)
v • d • e


LER-2077-002, Reportable Occurrence Relating to Boric Acid Transfer Pump
Event date:
Report date:
2802077002R00 - NRC Website
v • d • e

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l-. CONTROL BLOCK,j 1 'ICENSEE EVENT REPORT

  • I I I I (PLEASE PRINT AU REQUIRED INFORMATION]

LICENSEE NAME ~ Iv I A Is I Pl sl zl 7 8 9 14 CATEGORY REPORT TYPE 6 LICENSE NUMBER al al - I a I a I o I o I ol -1 o loJ 15 25 REPORT SOURCE DOCKET NUMBER LICENSE* TYPE I 41 1 I 1 *I 1 I o I 26 30 EVENT DATE EVENT TYPE lo I 31 31 32 REPORT DATE @ElcoN'T IP I o I w ~ I o I s I o 1-1 o I 2 I *s 1 1 I lol1!2l6!1l1I lolzlzlslzlzl

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57 58 59 60 61 68 69 74

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EVENT DESCRIPTION

@lg] I While using Boric Aci_d Transfer Pump l-CR-P-2D to provide recirculation* between 7 8 9 Boric I 80 @eJ I Acid Tank C anq

  • the Boron Injecti oo Taok, 7

8 9 tbe operator atteropted to roake up to..... t..ia'Me-----' 80 1°141 I Refueling w;ater Storage Tank and receiyed_ a no flow indication on the Boric Acid. 7 8 9 1°151 I Integrator,. The operator commenced a ramp-down as the no flow indication signified 7 8 9 I BO a I 80 1°161 I loss of ability to maintain recirculation between the* Boric Acid Tank and 7 8 9 PRIME COMPONENT the (Can't) I 80 SYSTEM CODE @E]IP!cl 7 8 9 10

CAUSE

CODE w 11 CAUSE DESCRIPTION COMPONENT CODE I v I A I L I vj El x J 12 17 SUPPLIER / w 43 COMPONENT MANUFACTURER I a I 21 s I s j 44 47 VIOLATION L'£J 48 1°181 I The loss of fl ow apparent] y 7 8 9 resulted from ao 01:>struction io tbe Jine from Boric Acid I 80 !ojsj I Tank C to the Boric Acid Transfer Pump~. The 7 8 g_; I 80 line was back flushed with primary lI@l I grade water and cleared of it$ obs-truction, Boric 7 8 9 I Acid Tank C was tbeu (Continued*) EEi 7 8 FACILITY STATUS lLl 9 80 METHOD OF % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION I 1 I ol ol I NA I Lu 12,... 3___......._ _________ 44 45 --=-NA ______________.....,! 46 80 10 CONTENT

  • . FORM OF ACTIVITY RELEASED rn lz.J OF RELEASE AMOUNT OF ACTIVITY LIi

.........,NA.....__ _____ ***-*.-_* ------JI LOCATION OF RELEASE I.._*...._NA __________________ L 7 8 9

- PERSONNEL NUMBER 10 11 44*

45 80 EXPOSURES TYPE

DESCRIPTION

12£1 I o I o I ol 7 8 9 11 LL ~N __ A ____ ___,--,----------------------------------' 12 13 60 PERSONNEL INJURIES NUMBER.

DESCRIPTION

EE Io I al cil 7 8 9. 11 12 80 OFFSITE CbNSEl)UENCES .[@I NA 7 89~-------------------------------------------------------------------------------------8~0 LOSS OR DAMAGE TO FACILITY TYPE

DESCRIPTION

[ili] w 7. -9 9 10 80 PUBLICITY [IE) NA 7 89.......,=---'-------"'---------------------------------------,-----,-------------------------------------B~O ADDITIONAL FACTORS ~ I The heal th and safety of the public were not affected by this event because the Safety! 7 B 9 80 [Tifil ! Injection System would have been able to provide the requisite shutdown capability. 7 8 9 80 NAME: ___________ T_. __ L_. __ B_a_u_c_om __...,...... ________ ~----- PHONE: ___ 3_5_7_-_3_1_8_4 _____ _ GPO 881

  • 667

/" EVENT DESCRIPTION (CONTINUED) Boron Injection Tank. After recirculation flow was reestablished by placing Boric Acid Tank B into service, the unit rampdown was reversed. This event is contrary to Technical Specification 3.2.C.6 and is reportable in accordance . with Technical Specification 6. 6. 2. b (2). (RO-S2-77-02 ). CAUSE DESCRIPTION (CONTINUED) sampled to verify its boron concentration*and returned to service. To determine the cause of the obstruction, Boric Acid Tank C was arained, opened and inspected. Nothing of substance was found in the tank. However, the suction valve (T-CH-130) to the boric acid transfer pumps had a ripped diaphragm. This type valve failure has been addressed in RO-Sl-77-05 and the programs initiated therein will alleviate this problem. The maximum time that the recirculation to the Boron Injection Tank was lost is estimated to be 1 3/4 hours as the system has performed satisfactorily during a previous evolution at 1700 and this event occurred at 1845. This did not hinder the Safety Injection capacity of the Boron Injection Tank as recirculation flow was immediately achieved upon lineup to the "B" Boric Acid Tank.

e e VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND.VIRGINIA 23261 February 28, 197T - Mr. Norman C. Moseley, Director Office of Inspection and Enforcement u. s. Nuclear Regulatory Connnission Region II - Suite 818 230 Peachtree Street, Northwest Atlanta, Georgia 30303

Dear Mr. Moseley:

Serial No. 076 PO&M/TAP:dgt Docket No. 50-281 License No. DPR-32 Pursuant to Surry Power Station Technical Specification 6.6.2, the Virginia Electric and Power Company hereby submits a copy of Reportable Occurrence No. RO-S2-77-02. The substance of this report has been reviewed by the Station Nuclear Safety and Operating Committee and will be placed on the agenda for the next meeting of the System Nuclear Safety and Operating Committee. Very truly yours, z$.m.~;,c.i4~-;r c. M. Stallings Vice President-Power Supply and Production Operations Enclosures 40 copies RO-S2-77-02 cc: Mr. Robert w. Reid, Chief Operating Reactors Branch 4

l CONTROL BLOCK: I e LICENSEE EVENT

  • REPOR *.

1 I I.1 I I (PLEASE PRINT ALL REQUIRED INFORMATION) LICENSEE NAME ~Iv I A Is I Pl sl 2! 7 8 9 14 CATEGORY REPORT TYPE 1 6 LICENSE NUMBER I al al-I al al ol al al-I ol.oJ 15 25 REPORT SOURCE OOCKET NUMBER LICENSE TYPE l411l1l1lol 26 30 EVEN'T GATE EVENT TYPE lo I 31 31 32 REPORT DATE @ElcoN'T IP I o I w lLJ lolslol-lo!2l s! 1I lol1l2l6!1!1I lol2l2!slzlzl 1 7 8 57 58 59 60 61 68 69 74 75 80

EVENT DESCRIPTION

.1°121 I While using Boric Acid Transfer Pump l-CH-P-2D to provide recirculation between Boric I 7 8 9 80 loj3j I Acid Tank G and the Baron Injection Tank, tbe operator.attero.pted to ro.ake up to the I 7 8 9 80

  • 1°141 I Refueling Water Storage Ta.uk and received a no flow indication on the Boric Acid I

7 8 9 80 1°151 I Integrator, The operator cnmmenced a ramp down as the na flow indication signified a I 7 8 9 80 lolsl I loss of ability to maintain recirculation between the Boric Acid Tank and the (Can't) I 7 8 9 PRIME 80 SYSTEM CODE @0 I Pl cl 7 8 9 10

CAUSE

CODE w 11 CAUSE DESCRIPTION COMPONENT CODE I v I A I 1 I vj El x J 12 17 COMPONENT SUPPLIER w 43 COMPONENT MANUFACTURER IGl2l5l5! 44 47 VIOLATION LI.J 48 1°1°1 I The loss of flow apparently resulted from an abstructi.an in the line from Boric Acid I 7 8 9 80 ~ I Tank C to the Boric Acid Transfer Ptunp., The line was back.flushed with primary I 7 8 9 80 [I@! J grade water and c] eared of its obstruction, Boric* Acid Tank C was tbeu (Continued) I 7 8 9 80 FACILITY STATUS EEi ILJ 7 8 9 FOAM OF ACTIVITY* RELEASED rn tzJ 7 8 9 PERSONNEL NUMBER % POWER OTHER STATUS I 1 I ol o!

  • NA 10 12 13 44 CONTENT OF RELEASE AMOUNT OF ACTIVITY LIi....,. N...,.A.__ _____ ____,__~

10

11.

44 EXPOSURES TYPE

DESCRIPTION

METHOD OF DISCOVERY Lu 45 46 I NA 45 DISCOVERY DESCRIPTION NA 80 LOCATION OF RELEASE I 80 II@l I *o I o I ol LL _N-A _______________________________ __, 7 8 9 11 12 13 60 PERSONNEL INJURIES NUMBER

DESCRIPTION

EEi to I ol ol 7 8.9 11 12 80 OFFSITE CONSEQUENCES .[2]1 NA 7 89.._ ______ ------------------"------------------------------------------~---------------8~0 LOSS OR DAMAGE TO FACILITY TYPE

DESCRIPTION

[2)) w 7 8 9 10 80 PUBLICITY (ill]._N=A=----------------------,------------------------' 7 8 9 80 ADDITIONAL FACTORS ~ I Tbe heal th and safety of the public were not affected by this event because the Safety! 7 8 9 80 O]J I Injection System would have been able to provide the requisite shutdown capability~ 7 8 9. 80 NAME: _________ --T_.--1_._B_a_u_c_om----------------- PHONE: 35 7-3184 GPO 881. 66r

  • ". Ill'-

EVENT DESCRIPTION (CONTlNUED) Boron Injection Tank. After recirculation flow was reestablished by placing Boric Acid Tank B into service, the unit rampdown was reversed. This event is contrary to Technical Specification 3.2.C.6 and is reportable in accordance with Technical Specification 6.6.2.b(2). (RO-S2-77-02). CAUSE DESCRIPTION (CONTINUED) sampled to verify its boron concentration and returned to service. To determine the cause of the obstruction, Boric Acid Tank C was arained, opened and inspected. Nothing of substance was found in the tank. However, the suction valve (T -CH-130) to the boric acid trans£ er pumps had a ripped diaphragm. This type valve failure has been addressed in RO-Sl-77-05 and the programs initiated therein will alleviate this problem. The maximum time that the recirculation to the Boron Injection Tank was lost is estimated to be 1 3/4 hours as the system has performed satisfactorily during a previous evolution at 1700 and this event occurred at 1845. This did not hinder the Safety Injection capacity of the Boron Injection Tank as recirculation flow was immediately achieved upon lineup to the "B" Boric Acid Tank. '\\

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