republic-os/legislation/us/states/ca/20172018/sb-1090.md

---
type: "Bill"
title: "Diablo Canyon nuclear powerplant."
description: "Under existing law, the Public Utilities Commission has regulatory authority over public utilities, including electrical corporations. The Diablo Canyon nuclear powerplant, composed of reactor Units 1 and 2, is operated by the Pacific Gas and Electric Company (PG&E) in the County of San Luis Obispo. The Nuclear Facility Decommissioning Act of 1985 requires each electrical corporation owning or operating nuclear facilities to establish an externally managed, segregated fund for payment of decommissioning costs of those facilities, establishes requirements for the collection of moneys for decommissioning costs in the utility's rates and charges, and requires that the expenses associated with decommissioning nuclear facilities be paid from those funds. Pursuant to the act, the commission ordered that 2 nuclear decommissioning funds be established for the Diablo Canyon Units 1 and 2 powerplant. Existing law requires the commission to cause an assessment to be completed by no later than July 1, 2018, conducted by an independent 3rd party, selected as specified, of the adverse and beneficial economic impacts and net economic effects that could occur, and of potential ways for the state and local jurisdictions to mitigate the adverse economic impact, if the Diablo Canyon Units 1 and 2 powerplant were to temporarily or permanently shut down before the powerplant's current operating licenses expire or when PG&E closes the powerplant upon the expiration of its current licenses. Existing law requires the commission to approve the withdrawal of $400,000 from the nuclear decommissioning funds established for the Diablo Canyon Units 1 and 2 powerplant for use by the commission for additional staffing to urgently effectuate the 3rd-party assessment. Pursuant to existing law, PG&E has filed an application with the commission seeking the commission's approval for the retirement of the Diablo Canyon nuclear powerplant."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20172018"
identifier: "SB 1090"
citation: "California SB 1090 (20172018)"
classification: ["bill"]
subjects: ["Diablo Canyon nuclear powerplant."]
status: "enacted"
primary_sponsors: ["Monning"]
version_count: 5
action_count: 27
vote_count: 8
first_action: "2018-02-12"
last_action: "2018-09-19"
source: "openstates"
source_identifier: "ocd-bill/e4293e79-3178-4e8a-834c-155ec20a6532"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180SB1090"
source_hash: "1e275e13c2f92dc89d88054a3e522a85520edd5937b4dee731e3f9027255f8c2"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-ca"]
---

# California SB 1090 (20172018) — Diablo Canyon nuclear powerplant.

Under existing law, the Public Utilities Commission has regulatory authority over public utilities, including electrical corporations. The Diablo Canyon nuclear powerplant, composed of reactor Units 1 and 2, is operated by the Pacific Gas and Electric Company (PG&E) in the County of San Luis Obispo. The Nuclear Facility Decommissioning Act of 1985 requires each electrical corporation owning or operating nuclear facilities to establish an externally managed, segregated fund for payment of decommissioning costs of those facilities, establishes requirements for the collection of moneys for decommissioning costs in the utility's rates and charges, and requires that the expenses associated with decommissioning nuclear facilities be paid from those funds. Pursuant to the act, the commission ordered that 2 nuclear decommissioning funds be established for the Diablo Canyon Units 1 and 2 powerplant. Existing law requires the commission to cause an assessment to be completed by no later than July 1, 2018, conducted by an independent 3rd party, selected as specified, of the adverse and beneficial economic impacts and net economic effects that could occur, and of potential ways for the state and local jurisdictions to mitigate the adverse economic impact, if the Diablo Canyon Units 1 and 2 powerplant were to temporarily or permanently shut down before the powerplant's current operating licenses expire or when PG&E closes the powerplant upon the expiration of its current licenses. Existing law requires the commission to approve the withdrawal of $400,000 from the nuclear decommissioning funds established for the Diablo Canyon Units 1 and 2 powerplant for use by the commission for additional staffing to urgently effectuate the 3rd-party assessment. Pursuant to existing law, PG&E has filed an application with the commission seeking the commission's approval for the retirement of the Diablo Canyon nuclear powerplant.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **02/12/18 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB1090&version=20170SB109099INT)
2. **03/15/18 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB1090&version=20170SB109098AMD)
3. **09/19/18 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB1090&version=20170SB109096CHP)
4. **SB1090** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180SB1090)
5. **08/23/18 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB1090&version=20170SB109097ENR)

## Votes

- Placed on suspense file — **6–0** (pass) · upper
- Do pass, but first be re-referred to the Committee on [Appropriations] — **6–1** (pass) · upper
- 3rd Reading SB1090 Monning et al. — **31–4** (pass) · upper
- Do pass. — **12–1** (pass) · lower
- Do pass, but first be re-referred to the Committee on [Environmental Quality] — **9–1** (pass) · upper
- SB 1090 Monning Senate Third Reading By CUNNINGHAM — **67–1** (pass) · lower
- Do pass and be re-referred to the Committee on [Appropriations] — **14–0** (pass) · lower
- Do pass — **5–0** (pass) · upper

## Sponsors

- Monning — primary (person)
- Cunningham — principal coauthor (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2018-02-12** Introduced. Read first time. To Com. on RLS. for assignment. To print. `introduction, reading-1`
- **2018-02-13** From printer. May be acted upon on or after March 15.
- **2018-02-22** Referred to Com. on RLS. `referral-committee`
- **2018-03-15** From committee with author's amendments. Read second time and amended. Re-referred to Com. on RLS. `reading-2, referral-committee, amendment-passage, committee-passage, reading-1`
- **2018-04-04** Re-referred to Coms. on E., U. & C. and EQ. `referral-committee`
- **2018-04-06** Set for hearing April 17.
- **2018-04-06** Set for hearing April 18 in EQ. pending receipt.
- **2018-04-18** From committee: Do pass and re-refer to Com. on EQ. (Ayes 9. Noes 1. Page 4718.) (April 17). Re-referred to Com. on EQ. `committee-passage-favorable, committee-passage, referral-committee`
- **2018-04-18** From committee: Do pass and re-refer to Com. on APPR. (Ayes 6. Noes 1. Page 4719.) (April 18). Re-referred to Com. on APPR. `committee-passage-favorable, committee-passage, referral-committee`
- **2018-04-20** Set for hearing April 30.
- **2018-04-26** April 30 hearing postponed by committee.
- **2018-04-27** Set for hearing May 7.
- **2018-05-07** May 7 hearing: Placed on APPR. suspense file.
- **2018-05-18** Set for hearing May 25.
- **2018-05-25** From committee: Do pass. (Ayes 5. Noes 0. Page 4303.) (May 25). `committee-passage-favorable, committee-passage`
- **2018-05-25** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2018-05-29** Read third time. Passed. (Ayes 31. Noes 4. Page 4348.) Ordered to the Assembly. `reading-3, passage, reading-1`
- **2018-05-29** In Assembly. Read first time. Held at Desk. `reading-1`
- **2018-06-14** Referred to Com. on U. & E. `referral-committee`
- **2018-06-28** From committee: Do pass and re-refer to Com. on APPR. (Ayes 14. Noes 0.) (June 27). Re-referred to Com. on APPR. `committee-passage-favorable, committee-passage, referral-committee`
- **2018-08-08** From committee: Do pass. (Ayes 12. Noes 1.) (August 8). `committee-passage-favorable, committee-passage`
- **2018-08-09** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2018-08-20** Read third time. Passed. (Ayes 67. Noes 1. Page 6411.) Ordered to the Senate. `reading-3, passage, reading-1`
- **2018-08-21** In Senate. Ordered to engrossing and enrolling.
- **2018-08-28** Enrolled and presented to the Governor at 3:30 p.m.
- **2018-09-19** Approved by the Governor. `executive-signature`
- **2018-09-19** Chaptered by Secretary of State. Chapter 561, Statutes of 2018.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/e4293e79-3178-4e8a-834c-155ec20a6532`. Confidence: reported (aggregated from official California legislature records).