05000289/LER-2017-001, Regarding Low Temperature Over-Pressurization (LTOP) Technical Specification Requirements Were Not Met

Regarding Low Temperature Over-Pressurization (LTOP) Technical Specification Requirements Were Not Met

ML17034A372
Person / Time
Site:	Crane
Issue date:	02/03/2017
From:	Callan E Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TMI-17-008 LER 17-001-00
Download: ML17034A372 (4)

LER-2017-001, Regarding Low Temperature Over-Pressurization (LTOP) Technical Specification Requirements Were Not Met

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 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)(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)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(b)(2)(ii)
2892017001R00 - NRC Website

text

Pl

7

~ Exelon Generation Three Mile Island Unit 1 Telephone 717-948-8000 Route 441 South, P.O. Box 480 Middletown, PA 17057 February 3, 2017 TMl-17-008 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001 THREE MILE ISLAND NUCLEAR STATION, UNIT 1 (TMl-1)

RENEWED FACILITY OPERATING LICENSE NO. DPR-50 DOCKET NO. 50-289

SUBJECT:

LICENSEE EVENT REPORT (LER) NO. 2017-001-00 10 CFR 50.73 "Low Temperature Over-Pressurization (LTOP) Technical Specification Requirements Were Not Met" This report is submitted in accordance with 10 CFR 50.73(a)(2)(i)(B). For additional information regarding this LER contact Mike Fitzwater, Sr. Regulatory Engineer, TMI Unit 1 Regulatory Assurance at (717) 948-8228.

There are no regulatory commitments contained in this LER.

Respectively,

\\.td~-!-J Site Vice President, Three Mile Island Unit 1 Exelon Generation Co., LLC cc:

TMI Senior Resident Inspector Administrator, Region I TMl-1 Senior Project Manager NRG FORM 366 (06-2016)

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 10/31/2018 (06-2016)

Estimated burden per response to comply with this mandatory collection request: 80 hours9.259259e-4 days <br />0.0222 hours <br />1.322751e-4 weeks <br />3.044e-5 months <br />.

Reported lessons learned are incorporated into the licensing process and fed back to industry.

• ~~

LICENSEE EVENT REPORT (LER)

Send comments regarding burden estimate to the FOIA, Privacy and Information Collections

~

c Branch (T*5 F53), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, or by e-mail

'..... ~

(See Page 2 for required number of digits/characters for each block) to lnfocollects.Resource@nrc.gov, and to the Desk Officer, Office of Information and Regulatory Affairs, NEOB-10202, (3150-0104), Office of Management and Budget, Washington, DC 20503. If a (See NUREG-1022, R.3 for instruction and guidance for completing this form means used to impose an information ccllection does not display a currently valid OMB central httQ://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1022/r3/)

number, the NRG may not conduct or sponsor, and a person is not required to respond to, the information collection.

3. PAGE Three Mile Island Unit 1 05000289 1 OF 3

4. TITLE Low Temperature Over-Pressurization (LTOP) Technical Specification Requirements Were Not Met

5. EVENT DATE

6. LEA NUMBER

7. REPORT DATE

8. OTHER FACILITIES INVOLVED YEAR I SEQUENTIAL I REV FACILITY NAME DOCKET NUMBER MONTH DAY YEAR NUMBER NO.

MONTH DAY YEAR 05000 FACILITY NAME DOCKET NUMBER 12 05 2016 2017 - 001

- 00 02 03 2017 05000

9. OPERATING MODE

11. THIS REPORT IS SUBMITIED PURSUANT TO THE REQUIREMENTS OF 10 CFR §: (Check a/I that apply)

D 20.2201 Cb>

D 20.2203ca><3>Ci>

0 50.73(a)(2)(ii)(A) 0 50.73(a)(2)(viii)(A)

N D 20.2201 (d)

D 20.2203(a)(3)(ii) 0 50.73(a)(2)(ii)(B) 0 50.73(a)(2)(viii)(B)

D 20.2203(a)(t>

D 20.2203(a)(4)

D so.13(a)(2)(iii) 0 50.73(a)(2)(ix)(A)

D 20.2203(a)(2)(i) 0 50.36(c)(1)(i)(A) 0 50.73(a)(2)(iv)(A) 0 50.73(a)(2)(x)

10. POWER LEVEL D 20.2203(a)(2)(ii) 0 50.36(c)(1)(ii)(A) 0 50.73(a)(2)(v)(A)

D 13.11 (a)(4)

D 20.2203(a)(2Hm>

D so.3s(c)(2) 0 50.73(a)(2)(v)(B) 0 73.71 (a)(S) 0 20.2203(a)(2)(iv)

D so.4s(a)(3)(ii) 0 50.73(a)(2)(v)(C)

D 13.11(a)(1) 0%

0 20.2203(a)(2)(v) 0 50.73(a)(2)(i)(A) 0 50.73(a)(2)(v)(D)

D 13.11(a)(2)(i) 0 20.2203(a)(2)(vi)

[gj 50.73(a)(2)(i)(B) 0 50.73(a)(2)(vii)

D 13.11(a)(2)(ii)

§1~1,'f;' c;, 11/'~f;:~ w*.~7*:.,

0 50.73(a)(2)(i)(C)

D OTHER Specify in Abstract below or in

'r

• hour clock to exit the condition was entered at 20:27 ahd immediate action to lower pressurizer level was initiated. At 21 :25, pressurizer level was stabilized at less than 100 inches and the Technical Specification action statement was exited.

8.

CAUSE OF EVENT

The apparent cause was determined to be inadequate procedure use and adherence fundamentals associated with reviewing, understanding and complying with procedure limitations and precautions. The procedures in use during the violated condition contained guidance to avoid exceeding the L TOP TS requirements.

C.

ANALYSIS I SAFETY SIGNIFICANCE This event had no effect on the health and safety of the public. There were no actual safety consequences for the condition because the Pilot Operated Relief Valve (PORV) was available during the entire time at which the violated TS condition existed. The PORV low pressure set-point for LTOP protection was enabled, operable and available and would have mitigated a potential RCS overpressurization event.

D.

CORRECTIVE ACTIONS

Immediate actions were taken to address gaps in understanding.

The involved individuals were coached for gaps in accountability with procedure use and adherence fundamentals associated with reviewing, understanding and complying with procedure limitations and precautions.

The applicable procedures will be revised with actionable steps to improve L TOP TS compliance.

Complete a performance analysis to determine training needs to improve understanding of the LTOP Technical Specification for various plant conditions.

E.

PREVIOUS OCCURENCES

Previous Events Previous Event Review None

• Energy Industry Identification System (EllS), System Identification (SI) and Component Function Identification (CFI) Codes are included in brackets, [Sl/CFI] where applicable, as required by 1 O CFR 50.73 (b)(2)(ii)(F). Page _3_ of _L