05000530/LER-2006-005, Re Manual Reactor Trip Due to Loss of Main Feedwater

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Re Manual Reactor Trip Due to Loss of Main Feedwater
ML062490194
Person / Time
Site: Palo Verde Arizona Public Service icon.png
Issue date: 08/28/2006
From: Eubanks C
Arizona Public Service Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
102-0555-CE/SAB/JAP/REB LER 06-005-00
Download: ML062490194 (7)


LER-2006-005, Re Manual Reactor Trip Due to Loss of Main Feedwater
Event date:
Report date:
Reporting criterion: 10 CFR 50.73(a)(2)(i)

10 CFR 50.73(a)(2)(vii), Common Cause Inoperability

10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded

10 CFR 50.73(a)(2)(viii)(A)

10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition

10 CFR 50.73(a)(2)(viii)(B)

10 CFR 50.73(a)(2)(iii)

10 CFR 50.73(a)(2)(ix)(A)

10 CFR 50.73(a)(2)(iv)(A), System Actuation

10 CFR 50.73(a)(2)(x)

10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor

10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat

10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown

10 CFR 50.73(a)(2)(v), Loss of Safety Function

10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
5302006005R00 - NRC Website

text

10 CFR 50.73 L-A A subsidiary of Pinnacle West Capital Corporation Cliff Eubanks Mail Station 7602 Palo Verde Nuclear Vice President Tel (623) 393-6116 PO Box 52034 Generating Station Nuclear Operations Fax (623) 393-6077 Phoenix, Arizona 85072-2034 102-05555-CE/SAB/JAP/REB August 28, 2006 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Dear Sirs:

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 3 Docket No. STN 50-530 License No. NPF 74 Licensee Event Report 2006-005-00 Attached please find Licensee Event Report (LER) 50-530/2006-005-00 prepared and submitted pursuant to 10 CFR 50.73. The LER reports a manual reactor trip due to an imminent loss of main feedwater.

In accordance with 10 CFR 50.4, copies of this LER are being forwarded to the NRC Regional Office, NRC Region IV and the Senior Resident Inspector. If you have questions regarding this submittal, please contact James A. Proctor, Section Leader, Regulatory Affairs, at (623) 393-5730.

Arizona Public Service Company makes no commitments in this letter.

Sincerely, CEISAB/JAP/REB/gt Attachment cc:

B. S. Mallett NRC Region IV Regional Administrator M. B. Fields NRC NRR Project Manager - (send electronic and paper)

G. G. Warnick NRC Senior Resident Inspector for PVNGS

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO, 3150-0104 EXPIRES: 06/30/2007 (6-2004)

, the NRC may sfor each block) not conduct or sponsor, and a person is not required to respond to, the digits/characters finformation collection.

1, FACILITY NAME

2. DOCKET NUMBER
13. PAGE Palo Verde Nuclear Generating Station Unit 3 05000530 1 OF 6
4. TITLE Manual Reactor Trip Due To Loss Of Main Feedwater
5. EVENT DATE
6. LER NUMBER
7. REPORT DATE
8. OTHER FACILITIES INVOLVED
- IFACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY YEAR None 05000 NUMBER NO.

FACILITY NAME DOCKET NUMBER 07 01 2006 2006 - 005 -

00 08 28 2006 None 05000

9. OPERATING MODE
11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply)

El 20.2201(b)

El 20.2203(a)(3)(i)

El 50.73(a)(2)(i)(C)

El 50.73(a)(2)(vii) 1*rE 20.2201(d)

[I 20.2203(a)(3)(ii)

El 50.73(a)(2)(ii)(A)

[E 50.73(a)(2)(viii)(A) oI 20.2203(a)(1)

El 20.2203(a)(4)

E] 50.73(a)(2)(ii)(B)

El 50.73(a)(2)(viii)(B)

[I 20.2203(a)(2)(i)

El 50.36(c)(1)(i)(A)

[I 50.73(a)(2)(iii)

[3 50.73(a)(2)(ix)(A) 11). POWER LEVEL [I 20.2203(a)(2)(ii)

El 50.36(c)(1)(ii)(A)

ED 50.73(a)(2)(iv)(A)

El 50.73(a)(2)(x)

El 20.2203(a)(2)(iii)

El 50.36(c)(2)

[I 50.73(a)(2)(v)(A)

El 73.71(a)(4)

[3 20.2203(a)(2)(iv)

El 50.46(a)(3)(ii)

El 50.73(a)(2)(v)(B)

El 73.71(a)(5) 55 [1 20.2203(a)(2)(v)

[I 50.73(a)(2)(i)(A)

[I 50.73(a)(2)(v)(C)

[I OTHER [I 20.2203(a)(2)(vi)

El 50.73(a)(2)(i)(B) r_ 50.73(a)(2)(v)(D)

Specify in Abstract below or in (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A)

The action to prevent recurrence is to install alternative sight glasses on condensate demineralizer service vessel viewports that are known to be resistant to catastrophic failure, accompanied by respective monitoring and preventive maintenance recommendations for the new sight glasses.

Other corrective actions include development and implementation of appropriate guidance for periodic inspection of other existing station sight glasses, including condensate demineralizer service vessels.

8.

PREVIOUS SIMILAR EVENTS

Arizona Public Service reported no similar event to the NRC within the last three years in which automatic or manual reactor trips initiated because of a loss of or imminent loss of main feedwater.

r,. t NR

- UFOM 366A* (7-2UU1J